GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: darkcharisma on January 10, 2021, 07:49:25 PM
-
I had an Avenger sent to me for mods, never had time until now.
I was not impressed with how the barrel band screws bit into the pressure tube. I can tolerate anything but damage to the pressure tubes, but thats just me.
that would be the only negative i have with the gun. i dont mind the cast metal because its functional and i can fix the threaded transfer port. i am rather impressed with the front half of the gun with built in plenum and reg housing all in one piece.
anyhow, there are three things i can improve upon the Avenger.
1. i can make an extension to inclease the plenum. the plenum is rather small, only .785x1.25".
2. i can make or mod the valve for better air flow, throat is only 7/32!
3. I can easily make a bottle adapter and run another regulator with 3000psi output from the bottle. same concept as the FX Mavrick so the guns reg doesnt have to deal with 4250psi.
the question remains: when can i do it? probably end of Feb , 2021.
-
Smile!
-
Keep us posted. I'm going to build a wooden stock, and having a bottle would be key.
-
Got a plenum made. with Nothing else but a plenum and a .218 barrel port. my .25 cal is shooting 34.39 grains at 910fps. Not bad! instant 63fpe conversion at 3000psi. air consumption is still massive. But who cares. 15 shots at +60fpe.
I had not modded the valve or have time to make a bottle conversion yet.
Corrections: 33.95grains @ 910fps for 62fpe.
-
Glad to see you back in the game!
-
yep finally back at it! coming out of the cave
-
Got a plenum made. with Nothing else but a plenum and a .218 barrel port. my .25 cal is shooting 34.39 grains at 910fps. Not bad! instant 63fpe conversion at 3000psi. air consumption is still massive. But who cares. 15 shots at +60fpe.
I had not modded the valve or have time to make a bottle conversion yet.
Corrections: 33.95grains @ 910fps for 62fpe.
Whoa, that Avenger is making some awesome power Sir! 8)
-
Good to hear from you,will you be offering replacement poppets for the Avenger?
-
Good to hear from you,will you be offering replacement poppets for the Avenger?
I do, but I dont recommend them. i have a 5% rate that complains about replacement poppets not sealing. mainly i think they burnish the poppet improperly and ended up having an uneven burnish ring on the poppet that wont seal. even when i tell them not to burnish.
I prefer to mod the valve and make a valve seat insert so the poppet seals with its OD.
-
Ok ,i was just wondering as to what to do if and when mine fails.
I thought it would be easiest to have a spare or two and just easily replace when the time comes.
I only fill mine to 3k,got the regulator down to 1.5k and im perfecty fine with accuracy with the 50 shots i get.
I also shoot it till the pressure in the tank is the same with the regulator pressure when im done shooting and store it like that.It might help with longevity?
I do, but I dont recommend them. i have a 5% rate that complains about replacement poppets not sealing. mainly i think they burnish the poppet improperly and ended up having an uneven burnish ring on the poppet that wont seal. even when i tell them not to burnish.
I prefer to mod the valve and make a valve seat insert so the poppet seals with its OD.
-
Keep doing what you are doing. But i think more or less how much is shot that determines the longevity. click on my website by my name
-
Ok ,thanks,will do.
Keep doing what you are doing. But i think more or less how much is shot that determines the longevity. click on my website by my name
-
The poppet in a regulated gun don't take near the abuse as a poppet in an unregulated gun.
-
These seem like great mods. I will be following.
-
Duy when I bought 2 poppets from you for the Liberty I'm curious as to whether or not one of those poppets would work in the Avenger 25 ??? Stephen seemed to think they were the same size however I really hate chancing on putting the spare that I have in it if it's not going to work.
-
They are the same Wayne, should be the same. <---(definitely the same)
-
3. I can easily make a bottle adapter and run another regulator with 3000psi output from the bottle. same concept as the FX Mavrick so the guns reg doesnt have to deal with 4250psi.
Hey, DC.
I'll be watching this thread with great interest, as I've embarked on a major modification plan on my Flashpup. (See my separate thread.)
About this "bottle adapter" idea:
Are you talking about some kind of hard, fixed connector? I'm trying to work this out myself. I was going to clamp-on a small buddy bottle, but connected with a hose. While that then gives the option of also putting it on a belt clip, it doesn't look very nice. So I'm considering permanently attaching it, in which case the valve could go forward.
It turns out that a 0.2L CF bottle, with regulator, would be exactly the right length to have the regulator's output even with my gun's end cap.
So, something like a "reverse C" shaped fitting might be really slick.
Is this doable?
And then, how would one fill the system? Could a new fill-port or hard nipple be fitted somewhere?
--------------
Also: I'm assuming that with such a setup, and the regulator set to 2900 psi, I could remove my HUMA regulator, and the entire original air tube would act as a 165cc plenum. Is that correct, or would something have to me further modified?
- Thanks in advance.
-
He CA
go to https://www.gatewaytoairguns.org/GTA/index.php?topic=164310.300 (https://www.gatewaytoairguns.org/GTA/index.php?topic=164310.300) this thread, page 16 post 313 and 321 to find out my answer for a bottle Flashpup. I would not hotwire anything to avoid the Frankenstein aesthetics. No external hoses... there is a fill port with the bottle regulator. use that to fill....
I may be doing the same thing with the avenger.
-
Thanks, DC.
I will read that carefully later, but a quick look at your picture tells me it could certainly work. and nice aesthetics.
But the wooden stock Flashpup has a MUCH ;longer air tube, so this would be extremely cumbersome, even with a tiny bottle.
Also, I'd want to keep the total length at 32". And doing it that way puts the weight a lot more forward. Especially so with a wooden pup.
it also puts some uncomfortable stuff right where one's left hand wants to go.
Here's a quick knock-up I just made of what might work, with the 0.2L bottle. (And my 0.3L detachable bottle idea, underneath.)
But kind of fugly.
Still, the weight distribution is much better, and you get a really nice palm-rest. I'm pretty sure my dimensions are REALLY close.
https://www.dropbox.com/s/6dpy7ju68o38621/Flashpup%20w%200.2L%20bottle%20-%20permanent%20mount%20.jpg?dl=0 (https://www.dropbox.com/s/6dpy7ju68o38621/Flashpup%20w%200.2L%20bottle%20-%20permanent%20mount%20.jpg?dl=0)
-
DC,
If this works, would you be willing to machine & sell me just the connecting block?
Also, am I correct that it replaces the Hatsan end cap? (This is important when calculating dimensions, given how tight my design is.)
-
so you want a reverse drop block? That's harder to do since I have to cut a thread to replace the end cap. Why don't you do what I did? that way the bottle is not hanging low like your illustrations, my bottle stays closer to the barrel in comparison. the weight is not bad, believe me you do not want the weight in the back since a bullpup is butt heavy already. every shot will make your barrel jump a bit, that jump transfers to the scope when you go 60fpe and above.
I can not take any orders for awhile, and I try not to cut any threads unless it is absolutely needed.
-
so you want a reverse drop block? That's harder to do since I have to cut a thread to replace the end cap. Why don't you do what I did? that way the bottle is not hanging low like your illustrations, my bottle stays closer to the barrel in comparison. the weight is not bad, believe me you do not want the weight in the back since a bullpup is butt heavy already. every shot will make your barrel jump a bit, that jump transfers to the scope when you go 60fpe and above.
As I explained, The Wooden stock version of the Flashpup has a much longer stock air tube.
I guess you could CUT the original tube and re-thread it, (And add an o-ring groove?) even though you say you try to avoid re-threading. But then you're losing some air capacity. Hmm, that could also work though. I wonder, why didn't you cut the tube on the gun you're modding? Here's a quick mock-up of how it would look: MUCH nicer, I think, and a better left-hand grip area as well:
https://www.dropbox.com/s/8581iyc8631ue7n/Flashpup%20-DarkCharisma%27s%20Mod%20-%20cut%20tube.jpg?dl=0 (https://www.dropbox.com/s/8581iyc8631ue7n/Flashpup%20-DarkCharisma%27s%20Mod%20-%20cut%20tube.jpg?dl=0)
-----------------
Interesting point about weight distribution, though. I always read that a heavy bullpup's weight isn't too bad because it's mostly at the rear. Are you saying that more weight in front adds stability to one's hold?
Also, I much prefer the aesthetics with the bottle mouth at the rear.
-
And heck, if you wanna' go hog wild on the thing, it becomes one heckuva' rifle:
https://www.dropbox.com/s/tw8orysnr970zjr/Flashpup%20-%20DC%20-%20My%20xtended%20Mods%20.jpg?dl=0 (https://www.dropbox.com/s/tw8orysnr970zjr/Flashpup%20-%20DC%20-%20My%20xtended%20Mods%20.jpg?dl=0)
-
They are the same Wayne, should be the same. <---(definitely the same)
AWESOME!!!!!!!!!!! I will be putting it in soon because the original poppet leaks slowly like the original on my Liberty did too. I never will figure out why on the Avenger they never beefed up the poppet in them cause they're not that great. Heck I've probably got less than 500 shots through it when the poppet started leaking.
-
Good to hear from you,will you be offering replacement poppets for the Avenger?
I do, but I dont recommend them. i have a 5% rate that complains about replacement poppets not sealing. mainly i think they burnish the poppet improperly and ended up having an uneven burnish ring on the poppet that wont seal. even when i tell them not to burnish.
I prefer to mod the valve and make a valve seat insert so the poppet seals with its OD.
duy I never burnished the poppet that's in my Liberty and it's still holding air perfect even after letting it sit for about 5 months now. One thing that I did notice after I put the peek poppet in was how much more energy that I was getting with the skinnier section on the poppet stem allowing much better airflow.
-
I'm almost at 3k pellets with my Avenger,got it last july and so far so good but like i mentioned above i keep the preasures low.
I like to get some spares at some point though.
-
got some spare time for this avenger. made a bottle adapter. and valves and peek poppet.
-
got some spare time for this avenger. made a bottle adapter. and valves and peek poppet.
Wow Duy, you're so busy that you even have to mod while you're on the road? That's awesome!
(just kidding, but at first glance I thought it was gonna be some kind a traffic sniper video) ;D ;D ;D
-
Does anyone know where I can buy the gauges and bonded seals for the AV Avenger, parts sure don't seem possible to get for these guns ???
-
got some spare time for this avenger. made a bottle adapter. and valves and peek poppet.
Wow Duy, you're so busy that you even have to mod while you're on the road? That's awesome!
(just kidding, but at first glance I thought it was gonna be some kind a traffic sniper video) ;D ;D ;D
LOL, Whatever airguns i workon at the time, I bring it with me wherever I go, so I can always look at it...bad habits.
Wayne, go buy some 10mm gauges, some thick 7/16 "washers" from lowes, stick an oring onto the threaded nipple of the gauge. install the washer and screw in. seals like a champ!
-
And heck, if you wanna' go hog wild on the thing, it becomes one heckuva' rifle:
https://www.dropbox.com/s/tw8orysnr970zjr/Flashpup%20-%20DC%20-%20My%20xtended%20Mods%20.jpg?dl=0 (https://www.dropbox.com/s/tw8orysnr970zjr/Flashpup%20-%20DC%20-%20My%20xtended%20Mods%20.jpg?dl=0)
You could also hold the drop block in similar to how valves are secured using screws, would avoid the need to rethread the end of the tube.
-
got some spare time for this avenger. made a bottle adapter. and valves and peek poppet.
Could you tell me what the thread measures that fit the cylinder?
I am Brazilian and I would like to make such an adapter for my avenger, however I need to know the measures to go through to make it.
-
And heck, if you wanna' go hog wild on the thing, it becomes one heckuva' rifle:
https://www.dropbox.com/s/tw8orysnr970zjr/Flashpup%20-%20DC%20-%20My%20xtended%20Mods%20.jpg?dl=0 (https://www.dropbox.com/s/tw8orysnr970zjr/Flashpup%20-%20DC%20-%20My%20xtended%20Mods%20.jpg?dl=0)
You could also hold the drop block in similar to how valves are secured using screws, would avoid the need to rethread the end of the tube.
i hope you dont mean the screws touching the outside diameter of the valve? whats holding the 3000psi pressure?
------
Fael, the thread that goes into the receiver is m17x1.25. I dont know the tubes thread.
-
I'm talking about a valve like the Marauder uses, I don't know how the Avenger valve is secured. Just drill holes around the circumference of the pressure tube and matching holes into the portion of the drop block that is inserted into it with an o-ring at the end. I drew a picture since I'm not good at describing things with words.
-
I know exactly what you are talking about. I was trying to see if you meant the Evanix style valves which were threaded into the tube but secured into the breech by 1 screw on the bottom.
The conversion I made to the flashpup is exactly like a plug with 4 securing screws, and no need to thread the tube as I have stated I don't thread tubes. So it's never the problem to begin with. why thread the tubes if you can plug it easily right?
-
watching
-
Watching, very interesting indeed!
-
I'm definitely watching.
-
Would you sell a bigger plenum for the avenger?