Anyone Beef Up Power On Crosman C11 Pistol ?

[wll2506]

I know it is a cheap non blowback gun, but it can serve a purpose. The gun as it comes from the factory is really in the 385+ fps range, I would like mine in the 425-450 range ?

Was wondering also if the gun can shoot lead .177 cal balls instead of steel BB's as there is no magnet in the BB loading mechanism ?

Just wondering.

wll

[wll2506]

Shot my C11 again today and this thing really impresses me ... not for the accuracy for pest shooting, but for the power of a small BB pistol. I chronographed it today and was getting 395fps out of the cylinder that had well over 60 shots from it. From 5 yards out it embeds BB's in hard wood and the gun holds 20 shots.



Being the gun is small for an airgun it is also very light for carry and sits very well in my pants pocket or light coat. The safety is on the right side, it is small yet easily flicked on and off --- perfect for a pocket gun.

Here is a pic of some wood siding shot from 5 yards out and all BB's are embedded in the wood ... this gun is shooting 395+ fps sending that BB hard !!



If you need a small carry for wild pest that might try to disrupt your day while riding your bike or whatever, this little gun will put the hurt on them for sure. Below is my small pistol case which includes the gun, three extra CO2's and two extra magazines.



I still wish it had a few more fps, but I may do some mods and I'll post them.

wll

[wll2506]

I ordered two more C11's from Gander Mountain at $26+. I will make sure they work and put them in a safe spot. I have plenty of CO2's and getting extra parts from Crosman this week. At the velocity this gun shoos, the small carry size, the reliability and the number of shots the magazine holds, for me this gun is a winner.

wll

[Rob M]

ive modded quite a few co2 pistols ( just made a 22 caliber vigilante last week ) .. the best mod for almost all was a longer barrel.. The crosman 1088 most likely had a similar valve to the c11. with a 9 inch barrel it was shooting 525 with 7.9 premiers. Thankfully straw barrels are cheap and abundant , ( 1077 barrel or daisy 880 barrel ) so a few of my swaps were with no machine tools. if the goal is to keep it short, theres not much that can be done aside from a thicker spring in the slide, or more prelaod on the existing spring.problem there is , that extra trigger preload adds to the trigger pull

[Mascot01]

Make any progress? Have a c11 I have to fix and then want to modify depending in options

[ER00z]

About 10-13 years back (possibly more) I had a few C11's. The easiest way to get more power (efficiently) is with a longer barrel. They made a C11 "Tactical" which had a fake suppressor, which actually was an extension for longer barrel. I believe these were the fastest shooting CO2 BB pistols in their day, rated at 550fps but I didn't have a chronograph at the time to verify the claims.

The way these pistols function, as you pull the trigger the barrel pushes foreword (there are two "fingers" on the trigger that contact a "block" on the barrel), this allows a BB to pop up from the magazine, at a certain point the "trigger fingers" slip from the block and a spring between the barrel block and muzzle piece pushes the barrel back chambering the BB and striking the valve (causing co2 to release, sending the BB down the barrel). If you either source a stronger spring or shim the original (between spring end and muzzle piece) you will increase the striking force on the valve, releasing more co2. This will also increase trigger pull weight. I found with an estimated 25% increase in velocity there was about 50% more CO2 usage with such a short barrel on the basic C11.

Alternatively, if you trim the factory spring or source a softer one the trigger pull weight will decrease, velocity will decrease and shot count will increase, a lot.

If you could source a C11 Tactical barrel, threaded muzzle piece and "suppressor"/barrel extension it would be the easiest way to increase velocity while keeping your current shot count.

[JoninMA]

I know this is the Crosman forum, but you need to check out the Daisy 415. 500 fps! I have 1 (well I had 2, the little lady claimed one as hers for chipmunks eating her garden). They scream, plus they're made in Japan, not China.

[markjs]

About 10-13 years back (possibly more) I had a few C11's. The easiest way to get more power (efficiently) is with a longer barrel. They made a C11 "Tactical" which had a fake suppressor, which actually was an extension for longer barrel. I believe these were the fastest shooting CO2 BB pistols in their day, rated at 550fps but I didn't have a chronograph at the time to verify the claims.

The way these pistols function, as you pull the trigger the barrel pushes foreword (there are two "fingers" on the trigger that contact a "block" on the barrel), this allows a BB to pop up from the magazine, at a certain point the "trigger fingers" slip from the block and a spring between the barrel block and muzzle piece pushes the barrel back chambering the BB and striking the valve (causing co2 to release, sending the BB down the barrel). If you either source a stronger spring or shim the original (between spring end and muzzle piece) you will increase the striking force on the valve, releasing more co2. This will also increase trigger pull weight. I found with an estimated 25% increase in velocity there was about 50% more CO2 usage with such a short barrel on the basic C11.

Alternatively, if you trim the factory spring or source a softer one the trigger pull weight will decrease, velocity will decrease and shot count will increase, a lot.

If you could source a C11 Tactical barrel, threaded muzzle piece and "suppressor"/barrel extension it would be the easiest way to increase velocity while keeping your current shot count.

I was thinking the same. I have a regular c11, but this is the one to have for power. You can't use it without the fake suppressor though. I suppose you could, but it would look odd and be easily damaged.

https://www.pyramydair.com/product/crosman-c11-semi-auto-air-pistol-co2-bb-kit?m=4083#7787

If you search Ebay and Amazon for "C11 Tactical Kit" you might yet find one.

[mobilehomer]

Here is the EVP. You might get the barrel and other parts from Crosman.
In fact, this intrigued me so much, I just ordered the parts from Crosman and am going to order a pistol to put them in.

[mobilehomer]

Got the barrel and other stuff today. The speed went from 405 to 455. Not bad for a CO2 pistol.

[TorqueMaster]

Old topic, new (to me) gun!

Crosman has these C11 on sale right now for $15, packaged in a simple brown box -- I picked one up mostly to get my order up to the free shipping level, but am pleasantly surprised how much fun it is.   Tiny, lightweight, efficient.

The power level and noise level are a little bit subdued for a CO2 pistol and I like that!  I reloaded that "20 bb" magazine at least 5 times before I could tell the CO2 was petering out -- almost 100 shots, or 120, I lost track  --  and still knocking aluminum cans over at 10 yards.  I'm guessing they designed it to shoot a little slower, and very efficiently, with the short barrel.  The fixed sights on mine are spot on enough to make the short range can blasting a ton of fun.   It reminds me of a tiny version of the 1600 powermatic -- it was a great can blaster back in the day too.

The safety caught me off guard -- when engaged, you can pull the trigger back easily, but it is disconnected from everything inside, so nothing happens.  I prefer the simplicity and no-trigger-movement of a manual cross-block safety, but this'll do.  Thankfully it is a manual safety.

On the downside, I did get a few dry fires I never figured out, and the magazine had a tendency to pop out a bit as if I'd hit the release, but I'm pretty sure I did not.  I think laying the gun on its left side may be enough weight to activate the magazine release button -- a stronger spring there would help prevent that, and maybe my phantom releases too.   I also never figured out how to consistently lock the magazine follower in the down position for filling -- so I just held the follower back, slightly awkward, but doable.

But overall a ton of fun in a tiny package.  I think I'll order at least one more for my bro who would probably find this thing worth packing along when camping out.

[Brewerja]

I swooped 2 of them from crosman last month also. It took me a minute of fiddling with it before i discovered, to lock the mag open, simply slide the spring downwards and gently press the slide button down. There is a small cut away/barb that will protrude out the bottom of the mag and catch locking it open.

Don't know if you guys do amazon but, i bought these with the intention of returning them if they didn’t work.
https://a.co/d/erULaGe
They work fantastic and half the price of the elusive crosman repackaged mags. I believe crosman is selling the mags for like $15 a piece.
 These, you get 2 for that price.
Sweet lil pistola, im just not a huge fan of the safety.

[TheOtherSprocket]

You people are mean and evil for showing me this...

Thank you!

[ER00z]

If you folks like the C11 but want something sturdier, give the Crosman PFM16 a look. Functions the same as the C11 except it's "metal" construction. Will accept C11 mags and BuckRail has something special for it... Clip the spring a tad to give up a little fps but have reduced trigger pull, increased shot count and lower db's...