My 99% complete custom 2240...

[eyebull]

...because a 2240 is never 100% complete...

But this is very close to what I want! It's taken me a few years to get here, but I finally have the semi-serious target pistol that I wanted to build.
The only original parts left on this are the foresight, gas tube, end caps, and the valve (though this has been tinkered with). Like nearly all custom 2240s. it's completely uneconomical and I could have just bought a proper target pistol for the money I have spent on this, but where would the fun be in that??

Parts list for the interested:
Globe ring for front sight from alliance hobby.
.177 barrel from a member on here, or the UBC - it's been a while!
Left handed .177 breech with hollow probe, from Gmac.
Trigger unit and grip, from Crosmods (fantastic trigger, awful company to deal with)
LPA MIM rear sight.
Valve and hammer springs have been balanced, with a top hat and spring guide for the hammer spring made from an allen screw and an empty .22 rf cartridge.

It gets about 35+ shots at about 5ft/lb.

http://imgur.com/a/nH5el

[gingernut]

Excellent.
Looks purposeful.

[AC all day]

Oooooh i want one of those trigger units!!!
Looks a lovely job there...well done

[ETCHY]

Very cool thing

[tim56]

Very nice too. I have a standard one apart from the trigger which i improved slightly by replacing the trigger packing spring washer with shim stock. Will
never be super accurate but a delightful pistol to use for plinking and playing with in the garden/garage. Tim

[eyebull]

Cheers guys

Oooooh i want one of those trigger units!!!

The trigger makes it, and really helps the extract that accuracy potential from the 2240.
It's just a shame that the guy who made it thought customer service and communication were alien concepts. His website is still up but I'm not sure he's trading anymore. Even if he is, expect to wait some months before dispatch, without having your emails answered. I was by no means the only person to experience this.
Can't recommend it for that reason alone sadly.

[harvey_s]

Hi
When I read your shot count I thought that doesn't sound like a lot...and I remembered something I read by a gent named Al Stone who once made a nice heavily modified 2240 and I dug up one of his posts for you...

In standard form a UK 2240 puts out around 450 fps / 5.3 flb with a 12grain .22 pellet with a 7” barrel, if you change the barrel over to a .177 10” barrel you will get around 550 fps / 5.5 flb with a .177 8.2 grain pellet, now this is pretty wasteful in Co2 as quite a bit just blows out of the barrel, and a low shot count around 40-50 per capsule plus an erratic shot string. If you do go down this road you would be better cutting two turn off the standard hammer spring which will bring the fps to around 525 fps / 5 flb, this will give you a virtual flat shot string with 60-70 shots per capsule, these figures are all at 60*F, so you will have a good margin for safety . If you can get the balance right the fps/flb will not vary much between 50*F and 70*f and still keep you below the 6lb limit.

http://i154.photobucket.com/albums/s...Shot-Chart.jpg

I hope this is some help to your project

BTW if you are still using the standard Crosman trigger spring I can heartily recommend TR Robbs trigger spring kit which transformed my 2250XL.

[eyebull]

Thanks Harvey - I cannot actually make the hammer spring any weaker on this set up, as it wouldn't be able to pierce the CO2 cartridge! It is only just piercing it at the moment. I went through about 5 iterations of different spring/guide/top hat configurations before I settled on this one. It's just strong enough to set the trigger at half cock, and as far as I can tell there is very little hammer bounce when it is gassed. No farting noises

However I am currently making a Stopped Spring Guide (SSG) which user Gerard showed us a link to the other day (see the thread lower down, Crosmsn 2240 tune for more shot count), which apparently has had superb results with increasing shot count and consistency. Multiple people have managed to wrest the best part of 100 shots (!) from a single cartridge....The idea is that it has minus preload, so the spring runs around a guide that has a top hat built in so that at rest, it sits a mil or so away from the hammer. This is said to almost completely eliminate both hammer bounce and the power curve, giving 90+ consistent shots before dropping off rapidly.

So I'm in the middle of building one of these, and I've had an idea that will prevent it from being able to be turned up to beyond 6 ft/lb (always a risk with power adjusters) - I'm going to use a threaded rod, and braze a nut to the end that projects from the rear of the pistol. At the hammer end I will cut the end of the rod off when I have reached the perfect length, and loctite the stop nut. I'm also going to braze a tube on the outside of the rear plug to both act as a guide and to tidy it up a bit aesthetically.
I have another scrappy 2240 that I can test this all on before tearing this one down again.


I suspect it may be able to get a few more than 35 shots at the moment though, but that is as far as I have tested it at this stage. Those 35 (-ish, I wasn't taking notes) shots were at full power without noticeable drop-off. I'll be taking it up the range next week and making notes, and shooting semi-serious cards rested, so I can see exactly what it is capable of.
The trigger unit is all completely aftermarket and there are no crosman parts inside it. It's a pseudo two-stage but very crisp.