New 2100

[mav72]

Hmmm I've never seen that version 2100.  If your reciever is metal, I think you're probably still good. I know the screw pattern on the (one year, lasts only one year) Leacy 1000 was different. You got me wondering if that gun really has a plastic piston, or the Legacy piston. I know a lot of people wanted to throw the Legacy piston in their 2100s. If it still the metal reciever with with the Legacy piston, Crosman may have done somethin right.

So you gonna shave the front sight and re-tap it for the new one to screw in and sit on top? The rear shouldn't be too hard to adapt. I got an old williams sight that was made for a tapered barrel to fit on mine.

[GreenDragon]

Hey Mav,

Yes, the receiver is actually metal!  I was surprised myself.  I guess I'm just going to have to go ahead and crack this baby open and see what's inside - Inquiring minds need to know

As for the sights, I was thinking along similar lines.  I'll decide my final approach once I get it all disassembled and figure out how they put this model together.   

Igor!  Prepare the surgery, strap down the patient, and raise the lightning rods!  MMWUU-HA HA-HA-HA!!!

[mav72]

A picture of the piston area beneath the pump forearm might give a hint on what piston the gun has.

Shoot, if it is indeed the Legacy piston, I may just have to get another 2100.   

Don't know if you've ever taken one of these types of rifles apart but it can be a balancing act with springs when putting it back together. Some are nice and friendly, others will fight you all the way. Put a stronger hammer spring and the gun can have you swearing for hours. Lol

[Tack Driver 10]

Here's my thoughts on the great 2100 controversy.
There are 3 versions, the 2100B, Legacy 1000 and the new 2100 whatever.

Perhaps Crosman was looking to lower the price point of the 2100 so they
decided to make the receiver out of plastic etc like the rest of their pumpers.

The Legacy 1000 is born, a thinly disguised version of the venerable 2100.
But wait, big problems with the plastic receivers breaking.

Plan B, make the receivers from some type of metal and now we have the new 2100X Classic.

It remains to be seen if the new metal receiver is as solid as the 2100Bs.

Sadly it looks like the 2100B is about to be NLA.

Looking forward to GDs review of the internals.

[GreenDragon]

Well, I did the tear down last night and have pictures below on what I found.  From what I can tell it's all pretty standard except for the metal receiver.  One piece plastic piston with the cone cup/valve assembly.  I'm glad I went ahead with the tear down, as there are a few easy fixes I'm going to do while it's apart:

1: Tape mods to both end of the barrel for stability and sealing at the breach.
2: Replace the sights and use shorter screws for the rear as the OEM screws are touching / deflecting the barrel.
3: Polish & moly the trigger assembly
4: Deburred the pump tube (did that before I removed the valve so as not to scratch the o-ring)
5: Seal the transfer "tube" between valve and barrel

I'm still glad I got it, and for $45 bucks what a steal.  I know the other Crosman platforms are easier to mod and work on, but I've just always had a soft spot for this gun. 

Tack Driver 10 - If you're feeling frisky I'd be interested in one of your custom piston / valve combos

Anyone know where I can get a better bolt probe that actually seals?  Or where to get some o-rings?

Thanks again everyone.  Once I get her back together and break it in I'll post another update.

[rangerfredbob]

While you have it apart, assemble the trigger parts in the left side plate if memory serves, bend the front leg of the spring back some to lighten the trigger, that'll do more for the trigger than anything else...

[Tack Driver 10]

GD, I don't see very much difference between your gun and the 2100B.
So the question is, why did they go through the trouble?
Perhaps some improvements that aren't obvious.
The solid piston from the Legacy would have been nice.

Do you have a Chrony or have access to one?
Would be nice to see what velocity that gun is pushing before and after mods.

I can make you a piston/valve.
I have the aluminum valve from my 2100 that I modified and got 928 FPS with 15 pumps.
It has a SS washer pressed onto the back so it won't slide back and other mods.
You can have it since all my valves are brass  now.
It's a cup type but I can make a FT along with a piston unless you want the cup.

For the probe I take an existing probe, cut off the door, turn it in the lathe, thread the plastic for 8-32 and make a brass
probe with an o-ring that threads on.

My 2100 has an o-ring encapsulated between the barrel and breech.
Had to trim the barrel about 1/16" but it works fine with a plain brass probe.

[Big Bore Bart]

 Modding the 2100/766 is a breeze.    I do still have a few of the last run of brass flattop valve caps.    The O-ring I use in the barrel is a 7mm x 1.5mm available at ACE Hdw, look in the bins.   I turn a recess into the end of the barrel that is 7 x 1.4mm, the plastic probe has a rebated area that makes a nice seal to the O-ring. 

[mav72]

If you don’t mind shortening the rear of the barrel a little bit to accommodate an “o” ring between the barrel and the transfer port housing, you can do that. Also wrap that area of the barrel with plumbers tape and burn in the transfer port hole with a soldering iron. That will make it nice and sealed. Mine use to kick the bolt open on every shot before the mods. This was a mod I shared with an old member “Petey” back in the day. Our AM77s looked like twins. Lol 

Hey, I know one difference. My plastic piston wasn’t rubbed. Lol

You can also flll your plastic stock with can foam. Drill small holes in the fake screws (do they still have those?) on the rear stock, spray expanding foam in hole, clean and let dry, then drill and screw in real screws.

[Tack Driver 10]

What would happen if these parts are installed in a 2100?

[GreenDragon]

I think I would have the most awesome 2100 in the whole state of Texas! 

[GreenDragon]

Here's another quick update:

So I've pretty much been following everyone's advice and done their suggested mods in addition to the ones I had originally listed.  I even filled the stock with a tube of latex caulk, which really helps the balance and removes that hollow drum sound.  I discovered that even my beloved aquarium sealant would not stick to the plastic of the barrel end where I had cut off the OEM front sight.  Thankfully, because it is plastic, it was a simple matter to tap a hole and install the sight with a screw.  I've attached a pic of the new sight picture.  That instantly did a lot to improve accuracy shooting with the iron sights. 

Tack Driver 10's generous donation of the piston/valve/bolt assembly is on it's way and I will post pics of the installation and then some test shots. 

Stay tuned!  I'm having a blast with this project gun

[mav72]

Lookin' good!

[GreenDragon]

TD10's parts came in as expected yesterday, and I was able to swap everything out in about 5 minutes.  I must say, I'm getting much faster at taking it apart and reassembling than the first time LOL.

Replaced the OEM valve and piston assembly with TD10's beautifully machined replacements.  His piston assembly is particularly elegant in that you can adjust the stroke length without removing anything from the airgun.  Genius!  Also installed the new bolt he sent me that has an o-ring to seal the breach.  That makes a huge difference in reducing the sound of the gun and increasing power.  I can no longer feel the puff of air from the breach upon firing. 

Did a couple test shots just using the iron sights at 20 ft to test her out.  4 shots each with 3 different pellets.  Not bad at all, as I was not really trying very hard.  Can't wait to put the scope back on and do some more accuracy trials.  If only the weather would clear up I can test it out at 30 yards.

Going to borrow a chrony from a friend next week so I'll be able to give a performance report.   

Stay tuned

[A.K.A. Tommy Boy]

Congratulations Steve, on your new 2100 !        I put a compact 4x20 CV Life scope on my 2100.  Shimming the barrel shroud is the only mod I have done with my gun so far.   The 2100 is very accurate out to 35yards. I have done some hunting with mine but mostly use it to target shoot with my grand kids.        Best Wishes - Tom

[Tack Driver 10]

Good to see everything arrived and got installed without a hitch.

Looking forward to the chrony results.

Should get around 800 FPS on 10 pumps.

[DanD]

I just received my $46 2100.
Here are some chrony numbers out of the box with CPHP:
4 pumps 468
6 pumps 540
8 pumps 590
10 pumps 622
12 pumps 645
The new smooth plastic stock exudes cheapness and makes the old plastic seem classy. I suppose that's why they can sell a new gun for $46 on Amazon and $40 at Walmart.
Anyway, if accuracy is good,  I'll be happy.  If it needs improvement, I'll tinker.
Have fun!

[GreenDragon]

Dan,

Thanks for posting your baseline numbers. That way I'll have something to compare against.

You'll get the best accuracy using a scope and at least shimming the front of the barrel.

Enjoy!

Steve

[Tack Driver 10]

Ran 2 of my guns over the chrony using 7.9 grain CPHPs.

#1. "1993" 2100 with 10 pumps=638 FPS 07.10 FPE.

#2  "1980"   766 with 10 pumps=704 FPS 08.70 FPE (+1.6).

Both guns are stock, in near new condition and both have the two piece metal/plastic piston.
The plastic pistons are different between the two.
The 766 plastic piston is .020" longer than the 2100 piston.

Perhaps there is credence to the old myth that the early models had more power?
Maybe we should call the MythBusters.

[mav72]

Ran 2 of my guns over the chrony using 14.3 grain CPHPs.

#1. "1993" 2100 with 10 pumps=638 FPS 12.92 FPE.

#2  "1980"   766 with 10 pumps=704 FPS 15.73 FPE (+2.81).

Both guns are stock, in near new condition and both have the two piece metal/plastic piston.
The plastic pistons are different between the two.
The 766 plastic piston is .020" longer than the 2100 piston.

Perhaps there is credence to the old myth that the early models had more power?
Maybe we should call the MythBusters.

Yep, I found out the hard way. I tried to stick a first generation 766 metal rod with piston into my AM77. Guess what!? I couldn't close the forearm.