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All Springer/NP/PCP Air Gun Discussion General => Machine Shop Talk & AG Parts Machining => Share Your Simple Home Projects (TRICKS-N-TIPS) => Topic started by: fsa46 on February 26, 2018, 03:48:29 PM

Title: Simple Mod On Red Dot To Improve Accuracy
Post by: fsa46 on February 26, 2018, 03:48:29 PM
 I've been having a ball shooting my FWB 65 all Winter in the basement with a cheap red dot sight but just felt I should do better.

This is the first time using a red dot sight and I really like it. However, I tried a simple mod that's really  easy and it paid off for me.

I made a paper template of the window and punched a 3/16" hole in the center. I then made a circle using a fine tip magic marker on the window.

What this does, is allow me to put the circle around the target and bring the dot into the circle and on the "bull". Using a red dot sight is instinctive bringing the dot into the center every time. With the circle in the center of the glass, I can consistently bring the dot to the EXACT same location every time.

Once I got accustom to it I instantly put the circle around the target first and then the dot resulting in better accuracy.

It's like having iron sights with a front and back sight to line you up.

This isn't for rapid fire shooting, but, it you're a 10-15 yard target shooter I think you'll like it.

The 3/16" circle works great for the distance I'm shooting but might require a different size at a different distance.

You might want to give it a try, if you do please let me know what you think. The marker come off easy with a Q-Tip and acetone.

Although the circle is crude ( I'm going to take it off and make another ) I'm just having to much fun to change it right now. It looks like it isn't in the center of the glass but it is, I wasn't holding the camera 90 degrees to the window.

I sent this idea to nine of the scope manufactures to see what they think. It's something that can be easily engineered into the window at very little cost that ( I believe ) target shooters and plinkers will like.

(http://)

Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: DameSp on February 26, 2018, 05:08:48 PM
I don’t get it...  so you drew a circle around the dot?

I’m not trying to be rude.  I’m just confused.  Maybe I missed something?  Maybe it’s just a personal visual thing?  I just don’t see how adding a circle would change anything when the red dot is still the intended poi.

Again, not trying to be rude.  If something is going straight over my head please correct me.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: north country gal on February 26, 2018, 05:45:22 PM
Somewhere in the distant past, I wrote a post on using red dots for 10 meter shooting. The basic takeaway from having used a variety of red dots at 10 meters is that using red dots that close can have parallax and, in some models, quite a bit of parallax. Very definitely an issue that affected my scores.

The way to solve any parallax issue is to make sure the eye is in the same position behind the optic for every shot. In my case, I accomplished this by placing a peep sight behind the red dot. It did eliminate parallax by forcing me to put my eye in the same position for every shot. It was strictly an experimental setup and not something I still use, but it worked.

Bottom line is drawing a circle to center around the bull and making sure the red dot is in the center is accomplishing the same thing. Sure beats using a peep sight and a red dot to get the same results. Well done, Frank.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: fsa46 on February 26, 2018, 06:00:26 PM
I don’t get it...  so you drew a circle around the dot?

I’m not trying to be rude.  I’m just confused.  Maybe I missed something?  Maybe it’s just a personal visual thing?  I just don’t see how adding a circle would change anything when the red dot is still the intended poi.

Again, not trying to be rude.  If something is going straight over my head please correct me.

 I did not take your post as being rude and glad you asked the question.

When using a red dot the dot is not in the center of the window, you have to put it there. If you move your head side to side or up and down the dot moves ( parallax ) in the window. We instinctively put the dot in the center when aiming with a red dot, however, if we're off even a little, the poi is also off.

By making a circle in the center of the window, I always bring the dot in the EXACT same spot in the window. This makes for a more consistent aiming, ( at least in my view ) with every shot.

Although I was shooting respectable rounds without the circle, I see a noticeable improvement with the circle.

This is so easy to do and easy to remove. I would love to see some of you pistol shooters give it a try and let me know what you think. Obviously I can't stress the importance of making the circle in the center of the window.

How to see parallax
Rest your rifle so it is steady without you holding it. Now, look through the scope at a target. With the scope reticle resting on a small target, move your head up and down and from side to side and watch the reticle move in relation to the target. If the scope’s parallax knob has been adjusted correctly, the reticle movement will be very little, but you should be able to see some movement at all times. That movement is parallax, and it demonstrates how important your eye placement is relative to the scope. If your eye moves, you will aim for the target in the wrong place – like the fish under water.


Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: fsa46 on February 26, 2018, 06:02:28 PM
Somewhere in the distant past, I wrote a post on using red dots for 10 meter shooting. The basic takeaway from having used a variety of red dots at 10 meters is that using red dots that close can have parallax and, in some models, quite a bit of parallax. Very definitely an issue that affected my scores.

The way to solve any parallax issue is to make sure the eye is in the same position behind the optic for every shot. In my case, I accomplished this by placing a peep sight behind the red dot. It did eliminate parallax by forcing me to put my eye in the same position for every shot. It was strictly an experimental setup and not something I still use, but it worked.

Bottom line is drawing a circle to center around the bull and making sure the red dot is in the center is accomplishing the same thing. Sure beats using a peep sight and a red dot to get the same results. Well done, Frank.

Thanks Joanie, that's EXACTLY what I was talking about.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: ranchibi on February 26, 2018, 06:02:47 PM
Frank, that is brilliant thinking on your part!
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Artie on February 26, 2018, 06:04:03 PM
Very interesting idea, especially in light of Frank and Joanie's past experiments. I believe I will file this tidbit for future reference. I've been considering a low magnification and lightweight red dot (if a reliable one exists) to sub for open sights. These old eyes need a little help I'm afraid.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: DameSp on February 26, 2018, 07:54:54 PM
I don’t get it...  so you drew a circle around the dot?

I’m not trying to be rude.  I’m just confused.  Maybe I missed something?  Maybe it’s just a personal visual thing?  I just don’t see how adding a circle would change anything when the red dot is still the intended poi.

Again, not trying to be rude.  If something is going straight over my head please correct me.

 I did not take your post as being rude and glad you asked the question.

When using a red dot the dot is not in the center of the window, you have to put it there. If you move your head side to side or up and down the dot moves ( parallax ) in the window. We instinctively put the dot in the center when aiming with a red dot, however, if we're off even a little, the poi is also off.

By making a circle in the center of the window, I always bring the dot in the EXACT same spot in the window. This makes for a more consistent aiming, ( at least in my view ) with every shot.

Although I was shooting respectable rounds without the circle, I see a noticeable improvement with the circle.

This is so easy to do and easy to remove. I would love to see some of you pistol shooters give it a try and let me know what you think. Obviously I can't stress the importance of making the circle in the center of the window.

How to see parallax
Rest your rifle so it is steady without you holding it. Now, look through the scope at a target. With the scope reticle resting on a small target, move your head up and down and from side to side and watch the reticle move in relation to the target. If the scope’s parallax knob has been adjusted correctly, the reticle movement will be very little, but you should be able to see some movement at all times. That movement is parallax, and it demonstrates how important your eye placement is relative to the scope. If your eye moves, you will aim for the target in the wrong place – like the fish under water.

Ah see, when you put it like that it makes sense.  I only use a red dot on my p17 for quick indoor target practice.  Everything else is either an expensive scope or open sights.

And I just wanted to make sure.  I try to put myself in other people shoes when I reply to threads.  When I read back my reply I felt like you might take it in a condescending manner.  I’m glad you didn’t :) 
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Mole2017 on February 26, 2018, 11:15:38 PM
The beauty of the reflex/holographic/red dot scopes is that heads up view works so well from the user point of view. But as I understand it, there is potential for some parallax error if the optics aren't really well designed. Better units claim minimal parallax error. Frank's modification is simply just trying to minimize the parallax error that comes from using the red dot from just any eye position that lets you acquire both target and red dot.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Horatio on February 26, 2018, 11:55:50 PM
The beauty of the reflex/holographic/red dot scopes is that heads up view works so well from the user point of view. But as I understand it, there is potential for some parallax error if the optics aren't really well designed. Better units claim minimal parallax error. Frank's modification is simply just trying to minimize the parallax error that comes from using the red dot from just any eye position that lets you acquire both target and red dot.

It is that ^.

AND, it is bracketing the target circle which will also help put the dot in exactly the center of the bull.
Interesting idea.

To this post, I also don’t know if any piece of glass will ever be parallax free. I know my TRS25 isn’t. I also wouldn’t be surprised if mounting the glass closer or further from your eye will change the parallax.

So the OP changed a red dot from a quick sighting system to something approximating a 2 aperture peep sight. I like it.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: cobalt327 on February 27, 2018, 01:35:35 AM
The discontinued(?) Daisy Max View red dot uses a similar setup. Along w/the small circle, it has a crosshair (not actually needed but it's there). It suffers from the lens having having a lot of reflection because it's uncoated (it sold for $10).
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: fsa46 on February 27, 2018, 06:38:43 AM
I have contacted several scope manufactures to see what the think.

In my opinion, there are three things a close range target shooter would want in a red dot sight,  eliminate parallax, a clear dot ( not fuzzy ) that doesn't cover the target but small enough to fit inside or at least cover the "9" ( not the entire target ) at 10-15 yards and a dot that doesn't wander.

Given these three things and you have an red dot optic that target shooters would love. The reason I say this is because I can see the remarkable improvement in my shooting since I added the circle. If I now had a smaller dot, say a 1 MOA or even a 3/4" MOA , I would be able to be even more precise in my aiming.

 Keep in mind, this is being accomplished with a person that has glaucoma and poor vision. If I seem to be excited about this, you're right. I can't believe something this simple could make that dramatic of a difference.

 


 
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Mole2017 on February 27, 2018, 08:58:16 AM
I have contacted several scope manufactures to see what the think.

In my opinion, there are three things a close range target shooter would want in a red dot sight,  eliminate parallax, a clear dot ( not fuzzy ) that doesn't cover the target but small enough to fit inside or at least cover the "9" ( not the entire target ) at 10-15 yards and a dot that doesn't wander.

Given these three things and you have an red dot optic that target shooters would love. The reason I say this is because I can see the remarkable improvement in my shooting since I added the circle. If I now had a smaller dot, say a 1 MOA or even a 3/4" MOA , I would be able to be even more precise in my aiming.


 Keep in mind, this is being accomplished with a person that has glaucoma and poor vision. If I seem to be excited about this, you're right. I can't believe something this simple could make that dramatic of a difference.

 

Some reading online puts the Daisy red-dot at about 3 to 5 MOA, covering about 1" at 25 yards. If you have $300 to $1000 EOTech has "holographic" scopes (essentially a red dot, just way better optics, I think) that get 1 MOA. There's others in between, but the cheapest of the middle ground ones that I considered where something like $40, but still had a pretty big dot.


UPDATE: Guess it's been a while since I shopped. Checking just now, Pyramyd as a number of red/green dot scopes claiming 1/2 MOA near the $40 mark.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: cobalt327 on February 27, 2018, 10:59:18 AM
Just be sure the "MOA" being referring to is the actual red dot size and not to the windage and elevation adjustment 'resolution'. But if there's red dots in the $40 range that have a 1 MOA dot size, that's something I'd like to look into. I just started searching for them and am coming up empty, if you saved a link or remember a brand/model of one, I'd appreciate knowing.

Good luck.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: SteveP-52 on February 27, 2018, 12:03:33 PM
I have an inexpensive Vokul holographic reflex sight that has that circle dot feature already built in as one of the 4 choices I can use when I turn it on. Mine's a little different than this one but you can at least see the 4 choices, https://www.amazon.com/Vokul-Tactical-Reticle-Reflex-Weaver-Picatinny/dp/B00WQPDA5O/ref=sr_1_4?ie=UTF8&qid=1519746756&sr=8-4&keywords=vokul+red+dot+sight (https://www.amazon.com/Vokul-Tactical-Reticle-Reflex-Weaver-Picatinny/dp/B00WQPDA5O/ref=sr_1_4?ie=UTF8&qid=1519746756&sr=8-4&keywords=vokul+red+dot+sight) 

We have a creek behind the house...fairly steep bank with a lot of trees and brush leading down to it and I have that reflex sight mounted on my brush gun. Works better than trying to line up a scope as I can look around and over it, then just snap the red dot on target and not have to try and line up with a scope.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Frank in Fairfield on February 27, 2018, 12:31:23 PM
Frank,
I have a UTG Tactical Dot Sight.
Red/Green intensified
The reticle has the circle you describe.
If I knew you wanted one of these I would sent it to you.
I still might... ;):
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Mole2017 on February 27, 2018, 12:42:36 PM
Good point, Mark, about the MOA part--I just looked at one that said "1/2 MOA click value 20 yards."

However, here's an inexpensive one that reviewers figure to be 1 or 2 MOA red dot size (and 1/2 MOA click value at 100 yards), dovetail mount: https://www.pyramydair.com/product/hatsan-1x30-red-dot-sight-fits-11mm-dovetail?a=6662 (https://www.pyramydair.com/product/hatsan-1x30-red-dot-sight-fits-11mm-dovetail?a=6662)

I like the pyramyd website for the reviews. If the description isn't quite clear, someone often gives a review with their experience. A lot of them are weaver mounts, but there are inexpensive adapters to get them to dovetail (and vice versa, too, I think).



Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Rick67 on February 27, 2018, 01:01:22 PM
I've been having a ball shooting my FWB 65 all Winter in the basement with a cheap red dot sight but just felt I should do better.

This is the first time using a red dot sight and I really like it. However, I tried a simple mod that's really  easy and it paid off for me.

I made a paper template of the window and punched a 3/16" hole in the center. I then made a circle using a fine tip magic marker on the window.

What this does, is allow me to put the circle around the target and bring the dot into the circle and on the "bull". Using a red dot sight is instinctive bringing the dot into the center every time. With the circle in the center of the glass, I can consistently bring the dot to the EXACT same location every time.

Once I got accustom to it I instantly put the circle around the target first and then the dot resulting in better accuracy.

It's like having iron sights with a front and back sight to line you up.

This isn't for rapid fire shooting, but, it you're a 10-15 yard target shooter I think you'll like it.

The 3/16" circle works great for the distance I'm shooting but might require a different size at a different distance.

You might want to give it a try, if you do please let me know what you think. The marker come off easy with a Q-Tip and acetone.

Although the circle is crude ( I'm going to take it off and make another ) I'm just having to much fun to change it right now. It looks like it isn't in the center of the glass but it is, I wasn't holding the camera 90 degrees to the window.

I sent this idea to nine of the scope manufactures to see what they think. It's something that can be easily engineered into the window at very little cost that ( I believe ) target shooters and plinkers will like.

(http://)

I have done this mod on one of my red dots (mine was the round type) too. I just went to a car parts store and bought a brake rubber cup that fits my RD and stuck it on the ocular section. It makes the FOV constricted though but it does refine your aim  :D
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: dan_house on February 27, 2018, 01:30:25 PM
brillinat!!

now to find a decent small rd dot sight.....
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: cobalt327 on February 27, 2018, 02:34:12 PM
Good point, Mark, about the MOA part--I just looked at one that said "1/2 MOA click value 20 yards."

However, here's an inexpensive one that reviewers figure to be 1 or 2 MOA red dot size (and 1/2 MOA click value at 100 yards), dovetail mount: https://www.pyramydair.com/product/hatsan-1x30-red-dot-sight-fits-11mm-dovetail?a=6662 (https://www.pyramydair.com/product/hatsan-1x30-red-dot-sight-fits-11mm-dovetail?a=6662)

I like the pyramyd website for the reviews. If the description isn't quite clear, someone often gives a review with their experience. A lot of them are weaver mounts, but there are inexpensive adapters to get them to dovetail (and vice versa, too, I think).
That red dot's a good find David. And I agree also re the reviews at Pyramyd- they often help clarify things for me.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Horatio on February 28, 2018, 04:22:22 PM
Just be sure the "MOA" being referring to is the actual red dot size and not to the windage and elevation adjustment 'resolution'. But if there's red dots in the $40 range that have a 1 MOA dot size, that's something I'd like to look into. I just started searching for them and am coming up empty, if you saved a link or remember a brand/model of one, I'd appreciate knowing.

Good luck.

I don't think dot size is a limiter to accuracy nearly as much as some people propose. If the Army and USMC trained soldiers to consistently hit a target thinner than the front sight width, why would dot size be determinant?
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Artie on February 28, 2018, 04:49:45 PM
Quote
I don't think dot size is a limiter to accuracy nearly as much as some people propose. If the Army and USMC trained soldiers to consistently hit a target thinner than the front sight width, why would dot size be determinant?

Are you referring to the 300 meter range? I could always see my popups out to 300 meters with iron sights. No way I would attempt a 300m target I couldn't see. The CCO's (dot) sure made it a lot easier though.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: George Schmermund on February 28, 2018, 05:01:46 PM
The red dot sights that I've collected are useful in some situations. The down side is that the dot can move if your head moves while sighting. Maybe my experience is because I've only bought cheap sights. I've never looked through a really good one so I can't claim that the dot moving around at the POA is endemic to all red dot sights.

Working with the ones I've got required some way to assure that the dot was always where it should be for best accuracy. I was going to post my approach to a cure in another thread last year, but the discussion had such a derisive tone I decided not to get involved.

This thread is much more civil and what is being discussed as a treatment for a real problem is reassuring. It's not being regarded as another UFO sighting. The photo shows the method that I've found most useful. It's the o-ring method. I just used a small one I had laying around. Home depot has lots to choose from. There are no specific dimensions, but the one in the photo is 3/16" I.D. That seems to work well, but when I find one with about the same I.D. with a thinner wall I'll switch them out. Spit works good as a temporary glue even after it dries. this allows testing and adjustment until you're ready to commit.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Artie on February 28, 2018, 06:21:15 PM
I like the idea of using a dot sight at 10-20 yards. I have two or three lightweight 500 fps guns and I would prefer to keep them that way. I'm thinking red dot may be the answer but I would need a bit of magnification. I have to use glasses to see my target at 10 yards. It is paper with a series of one inch circles having @ 3/16" bullseyes.  Even with fine fiber optic open sights the bullseye is 90% obscured.
The circle/o'ring idea would almost be a requirement since most dot sights I've used have parallax under 50 yards and that range is most of our shooting. The circle would certainly aid in centering the red dot to minimize parallax for close range targeting.
The other bebefit with the dot is rapid target acquisition, very handy for pesting and varminting.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: fsa46 on February 28, 2018, 06:49:07 PM
[quote author=Horatio l
I don't think dot size is a limiter to accuracy nearly as much as some people propose. If the Army and USMC trained soldiers to consistently hit a target thinner than the front sight width, why would dot size be determinant?
[/quote]

 The only reason I would like a smaller dot is for 10- 15 yard target shooting as stated above. The dot on the cheaper sight I think is 2 MOA. I say think because I have a Vortex Venom that's 3 MOA and the dot on the sight I'm using now is definitely smaller and that's the reason I'm using it.

The 3 MOA dot completely covers the "bull", and than some. The 2 MOA just barely covers the " bull". I would like a tiny dot that I could see inside the "bull" and for me, feel it is a lot more precise aiming and hence better accuracy.

The best way I can explain how I feel is, (and I'm not talking MOA ). A 3" dot covering a 3" circle isn't going to be as accurate as a 1/16" dot precisely aimed inside a 3" circle. I know this is a dramatic example  but makes my case.

I ran into the same thing with my FWB 300S collection. These are very accurate 10 meter shooters, but, I use a scope on them and shoot from 10 yards to 25 yards .The scopes I was using had to thick of a reticle for target accuracy. When I went to the Hawke 4-12X40 AO, with the thin AMX reticle the results were there with a lot tighter groups. All five of my 300 S springers have the same scope on them for that reason.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Horatio on February 28, 2018, 10:56:28 PM
[quote author=Horatio l
I don't think dot size is a limiter to accuracy nearly as much as some people propose. If the Army and USMC trained soldiers to consistently hit a target thinner than the front sight width, why would dot size be determinant?

 The only reason I would like a smaller dot is for 10- 15 yard target shooting as stated above. The dot on the cheaper sight I think is 2 MOA. I say think because I have a Vortex Venom that's 3 MOA and the dot on the sight I'm using now is definitely smaller and that's the reason I'm using it.

The 3 MOA dot completely covers the "bull", and than some. The 2 MOA just barely covers the " bull". I would like a tiny dot that I could see inside the "bull" and for me, feel it is a lot more precise aiming and hence better accuracy.

The best way I can explain how I feel is, (and I'm not talking MOA ). A 3" dot covering a 3" circle isn't going to be as accurate as a 1/16" dot precisely aimed inside a 3" circle. I know this is a dramatic example  but makes my case.

I ran into the same thing with my FWB 300S collection. These are very accurate 10 meter shooters, but, I use a scope on them and shoot from 10 yards to 25 yards .The scopes I was using had to thick of a reticle for target accuracy. When I went to the Hawke 4-12X40 AO, with the thin AMX reticle the results were there with a lot tighter groups. All five of my 300 S springers have the same scope on them for that reason.
[/quote]

I 50/50 agree. But to share something personal, the fact that I’m so bad at offhand shooting, and the fact that I’m not great at shooting with both eyes open. And having a slight astigmatism makes the dot look slightly like a comma.

Stated in reverse, if I put the comma (dot) in the same exact spot on the target, and the comma is In the same part of the window (especially on a cheap red dot), I get the same POI. If I shot better with both eyes open, I think the dot size would not matter as much.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: fsa46 on March 27, 2018, 07:47:20 AM
Just curious if anyone has given this a try and how you like it. Having use this for quite some time now, I am convinced the improvement in accuracy is dramatic.

Keep in mind, if you do not have a parallax issue with your Red Dot this isn't going to help you. On the sight I'm using, if I move my head left to right there isn't any parallax issue, but when I move it up and down the "dot " moves and this mod corrected that problem .

It's hard to believe but I sold the Vortex Venom because like I actually like this $20.00 Red Dot sight a lot better then the Venom after I made this mod.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: d-cuttler on October 05, 2018, 03:48:22 PM
Maybe you could use a "hole saver" the kind sold in office supply stores to repair torn holes in paper for 3 ring binders. You could darken one with a felt tip marker, and just stick it on. They come with an adhesive back, and cost almost nothing.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: falvesjr on October 05, 2018, 09:40:52 PM
...has that circle dot feature already built in as one of the 4 choices I can use when I turn it on.

Steve,

Unless the circle is etched or printed on the reflector, it doesn't help at all. Think of it this way, if the circle is projected along with the center dot, it will move with it as you move your eye. By having it physically on the reflector, it gives you a "target" to place the red dot on that stays put in the center of the view.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Stinger177 on October 05, 2018, 11:26:25 PM
I find this whole concept quite brilliant and I'm wondering why the manufacturers havent thought of it. If I were you I would look immediately into a patent.

Just throwing this out there, but could the use of thin clear glass like a cell phone screen protector material be of use?

The inner circle could be laser etched, and the overall diameter laser cut.

I love the whole idea because I have begun making my own clear globe sight inserts, playing with different hole sizes and inner circle sizes.

Just sayin'........
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Rick67 on October 07, 2018, 02:48:07 AM
Like I have said, rubber brake cups work well and do not look funky. If you want the hole to be smaller just install an O-ring.

I have done this mod a long time ago back in 2009 or 2010, iiric. The idea was concocted by a member of the Crosman Pistol Forum. I think was Mr. Larry, aka BreakfastChef.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Hoosier Daddy on October 07, 2018, 08:01:23 AM
I saw where you mentioned it before and since you brought it up again, I am going to ask...
 What are you calling "rubber brake cups"?
 I have have been thinking of both disc brake and shoe brakes systems and can not visualize what part you are talking about.

  It's early, I need more coffee
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Wolverineshooter on October 07, 2018, 08:27:39 AM
Interesting idea, will have to try it
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Ol'DeadEye on October 07, 2018, 08:46:40 AM
I saw where you mentioned it before and since you brought it up again, I am going to ask...
 What are you calling "rubber brake cups"?
 I have have been thinking of both disc brake and shoe brakes systems and can not visualize what part you are talking about.

  It's early, I need more coffee
I think this is what he's talking about.   
Drum brake cylinder rebuild kit.   
https://www.amazon.com/Raybestos-WK21-Professional-Cylinder-Repair/dp/B000CP8PH8?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-d-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B000CP8PH8 (https://www.amazon.com/Raybestos-WK21-Professional-Cylinder-Repair/dp/B000CP8PH8?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-d-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B000CP8PH8)
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Hoosier Daddy on October 07, 2018, 09:06:38 AM
Of course! the Dust boot on a wheel cylinder.
All I could think of was the inner piston seal cup.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: bandg on October 07, 2018, 10:30:31 AM
I haven't used a red dot on any of my air guns and haven't felt a need for anything along these lines but I was thinking how it could be made to work for those who need such a thing.  What about a glass or plastic lens with a crosshair or even just a small dot etched into the lens.  The dot or crosshair might appear to float in the red dot field of view without obscuring the view through the sight but would provide a secondary "floating" aiming point to be seen to align with the standard dot.  Just a thought.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Rick67 on October 07, 2018, 11:23:19 AM
I saw where you mentioned it before and since you brought it up again, I am going to ask...
 What are you calling "rubber brake cups"?
 I have have been thinking of both disc brake and shoe brakes systems and can not visualize what part you are talking about.

  It's early, I need more coffee

Not actually the dust boot, HD sir.

It is this one:



http://www.seekpart.com/product/rubber-cup-for-wheel-brake-3318502.html (http://www.seekpart.com/product/rubber-cup-for-wheel-brake-3318502.html)

Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Rick67 on October 07, 2018, 12:08:40 PM
(https://i.imgur.com/vtwmtRh.jpg?2)


(https://i.imgur.com/sP5WwFi.jpg)

This guy and his European cnc machine can make gaskets, seals, etc., of all kinds and specs. Cost was from $1 upwards depending on the size and material.

He made one for me eventually for my RD but I was not able to take pics of it.

This was when I was still in the Philippines:


(https://i.imgur.com/YGYODPH.jpg)


You can go the caveman approach though, cut a paper, perforate it at the center, and Sharpie it. I am very meticulous and I want my stuff nice and classy.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Hoosier Daddy on October 07, 2018, 12:21:45 PM
Thanks!
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Rick67 on October 07, 2018, 12:36:53 PM
Thanks!

No problem, HD sir.

I was spoiled when I was still in my native country because I had personal access to so many machine shops.

The automotive stores there are ubiquitous, you can find them everywhere.

Super cheap too!

Can you imagine a rubber cup costing a penny?

This reduced RD window does work, btw, so kudos to the OP  8)
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: screwwork on October 07, 2018, 12:40:23 PM
Nowadays you could find someone with a 3D printer to make up cool center dot alignment tool for your reddot scope.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Hoosier Daddy on October 07, 2018, 12:41:12 PM
I can just imaging the look on the kid's face behind the counter at the auto-parts store when I walk in with my BSA RD-30.
HAHAHAHA
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: BoostCreep on November 18, 2018, 08:36:08 PM
I took a 1/4"-2mm o ring. put a minuscule drop of ca glue on a super fine paint brush and dotted one side of the o ring, then set it in place with curved jeweler's pliers.
works fantastic! really helps my 7 year old keep the same point of aim with the parallax of a cheap red dot.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Slavia on November 19, 2018, 09:00:34 PM
Good idea.  I think it would be more beneficial on a pistol, since you don't have the cheek weld of a rifle stock to position the eye consistently.  Another problem I've had is that the red dot on some scopes "washes out" in very bright sunlight (i.e., isn't bright enough).  I got a small scrap of smoked gray plexiglass from the local glass place, and mounted it in the same manner you describe.  Now my red dot scope has sunglasses.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: BoostCreep on November 19, 2018, 09:50:40 PM
heres a pic. works wonders, seriously I dont know why mfgs dont throw printed crosshairs or circles on the lenses!
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: HunterWhite on November 20, 2018, 11:37:54 AM
Wow! I had to google that. I thought that a true holographic sight was on target if the dot was on, but you are right.

" Like the reflector sight, the holographic sight is not "parallax free", having an aim-point that can move with eye position.  "

No wonder I could never hit anything when using one. Even the $500 stuff has this problem.

Good on you!

P.S.
The screen protector seems like a good idea.
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Rick67 on December 30, 2018, 10:05:14 AM
I installed one on my phased plasma pulse rifle  ;D


(https://i.imgur.com/1Xm3mG6.jpg)
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: screwwork on December 30, 2018, 05:18:17 PM
Nice looking AG Rick!
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Eddie_E on December 30, 2018, 07:45:10 PM
I have a Hammers 2x42 red dot sight that I bought several years ago that has everything you guys have asked for in this thread. It also fit both 11 mm and Weaver rails. My only issue was forgetting to turn off the power and killing batteries.

CVlife makes a Daisey style without magnification
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Rick67 on December 30, 2018, 08:16:18 PM
Thank you, ScrewWork sir!
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Horatio on January 01, 2019, 12:20:30 AM
Wow! I had to google that. I thought that a true holographic sight was on target if the dot was on, but you are right.

" Like the reflector sight, the holographic sight is not "parallax free", having an aim-point that can move with eye position.  "

No wonder I could never hit anything when using one. Even the $500 stuff has this problem.

Good on you!

P.S.
The screen protector seems like a good idea.

Yes. They have some parallax. Some of mine the dot moves almost nothing then a little when it gets to the edge it doesn't like (like the upper left or far right). I haven't yet checked on whether different eye reliefs improves or worsens the effect.

Remember though, they were never meant towards the same kind of precision of a good magnified optic, but rather faster and easier target  acquisition. And I'm pretty sure magnified optics are the same way- best to have your eye is exactly the same place if you want the same point of impact.

With both magnified optics and red dots, I think the higher end ones will probably suffer less from not having your eye in the exact same position and being more true to whatever parallax yardage they advertise. 
Title: Re: Simple Mod On Red Dot To Improve Accuracy
Post by: Wolverineshooter on December 16, 2019, 08:38:22 PM
These are great ideas. I  will probably do 5he firing thing on my reddot