Lightweight bottled 2240 for the kiddos...now put through the paces!

[nervoustrigger]

I did a little more work on the gun this weekend.  The Crosman skeleton stock was just far too long for the kids to use so I ordered one of the adjustable stocks on ebay for $15 (free shipping) http://www.ebay.com/itm/201612669809


And a piece of 3/4" aluminum bar stock from Amazon for $7 


I used the bar stock to make a new tube cap, and used some 3/4" and 1" PVC to fashion an adapter to secure the buttstock to the end cap.  Here it is all laid out:


A closeup of the end cap and SSG:


The adapter installed:


And the finished results:




I'm pleased with how it turned out.  Everything fits very solidly and there is no play except for the sliding mechanism of the buttstock itself.  And the adjustment range is plenty for everyone.

The only issue I ran into was that the cheek weld was too high for the small 3-9x32 scope on low mounts, so I swapped in another scope in high mounts and that works nicely.

It is shooting the Air Arms 8.4gr at 838fps (13fpe) with an ES of 6fps over 20 shots when I stopped checking.  And it continues to demolish the 1/2" Mardi Gras beads hanging from the 43 yard target.  A fun little gun!

[WECSOG]

Great job, Jason! I really like the low budget trick for pressurizing the tube.

Btw, a 2400 won't work with a tank block unless you replace the tube with one for a 2260. That's what you have to do if you want the forend. The other option (sans forend) is to get a 2300 instead, because it is basically a CCS 2240. The longest barrel available on them is 14.6", so you would have to replace the barrel if you wanted it longer.

[Edtampa]

Jason,
Any idea as to the weight of the entire gun?

[nervoustrigger]

Great job, Jason! I really like the low budget trick for pressurizing the tube.

Btw, a 2400 won't work with a tank block unless you replace the tube with one for a 2260. That's what you have to do if you want the forend. The other option (sans forend) is to get a 2300 instead, because it is basically a CCS 2240. The longest barrel available on them is 14.6", so you would have to replace the barrel if you wanted it longer.

Thank you!

Can you fill me in on what it is about the 2400 tube that won't allow it to be pressurized?  I'm seriously considering building another, this time holding to the goals I originally set out and the 2400 otherwise looks like a good starting point.

[nervoustrigger]

Ed, I don't know how accurate my scale is but it reads almost 6lbs as shown with the big scope.

[MDStroup]

Great job, Jason! I really like the low budget trick for pressurizing the tube.

Btw, a 2400 won't work with a tank block unless you replace the tube with one for a 2260. That's what you have to do if you want the forend. The other option (sans forend) is to get a 2300 instead, because it is basically a CCS 2240. The longest barrel available on them is 14.6", so you would have to replace the barrel if you wanted it longer.

A better starting point would be the 2400KT from the Crosman custom shop, it would even be cheaper as Jason and i discussed earlier in the thread.

[MDStroup]

I did a little more work on the gun this weekend.  The Crosman skeleton stock was just far too long for the kids to use so I ordered one of the adjustable stocks on ebay for $15 (free shipping) http://www.ebay.com/itm/201612669809


And a piece of 3/4" aluminum bar stock from Amazon for $7 


I used the bar stock to make a new tube cap, and used some 3/4" and 1" PVC to fashion an adapter to secure the buttstock to the end cap.  Here it is all laid out:


A closeup of the end cap and SSG:


The adapter installed:


And the finished results:




I'm pleased with how it turned out.  Everything fits very solidly and there is no play except for the sliding mechanism of the buttstock itself.  And the adjustment range is plenty for everyone.

The only issue I ran into was that the cheek weld was too high for the small 3-9x32 scope on low mounts, so I swapped in another scope in high mounts and that works nicely.

It is shooting the Air Arms 8.4gr at 838fps (13fpe) with an ES of 6fps over 20 shots when I stopped checking.  And it continues to demolish the 1/2" Mardi Gras beads hanging from the 43 yard target.  A fun little gun!

The stock idea is awesome nervoustrigger. Mine i plan on trying to use the TKO 22 tube stock.

[Tater]

Nice job Jason, looks great too.
I have the same problem with AR stocks and low rings.

[UCChris]

Michael, the TKO tube stocks are awesome!

[MDStroup]

Michael, the TKO tube stocks are awesome!

WOW!!!! All three of those are beautiful! I have to ask, is that a don cothran 2260 PCP tube, And what length barrel is that?

[UCChris]

That is a 16" Cothran Disco tube with a 14.5" barrel.

[MDStroup]

That is a 16" Cothran Disco tube with a 14.5" barrel.

Nice! I was talking to him about a few different build ideas. One was his 2260 pcp tube, steel breech, TKO 22 tube stock, 16 or 18 inch barrel, forearm up in the air. Maybe a GMAC custom 2250 long forearm.

[UCChris]

That's about where I'm at with this one.

[MDStroup]

That's about where I'm at with this one.

Nice! I think i would personal go with a 16 inch .177 barrel and Rocker1 LDC on a build like that.

Do you plan on using a shroud? Because i just noticed the riser under the breech.

[MDStroup]

I have a question. It is hypothetical.

If some one was to build a 25 cal version of a bottled 22xx airgun, what length do you think would be optimal for the airtube?

[UCChris]

How many shots do you want and at what power?

[MDStroup]

How many shots do you want and at what power?

Dont know. It was just a thought that passed through my head that wont leave. I think i would value power over shot count. That is the whole reason to go to 25 cal over 22cal.

[Wayne52]

How many shots do you want and at what power?

Dont know. It was just a thought that passed through my head that wont leave. I think i would value power over shot count. That is the whole reason to go to 25 cal over 22cal.

As long as I have 20 good shots I'm good!  When I hunt with powder burners I never use a heck of a lot of ammo anyway

[Hobbyman2007]

If building a .25 and using a bottle . 9" of tube ahead of the valve will give enough plenum for about 50fpe . If not using a bottle I'd would get a 24"tube , that would give an acceptable shot count .IMO

[WECSOG]

Great job, Jason! I really like the low budget trick for pressurizing the tube.

Btw, a 2400 won't work with a tank block unless you replace the tube with one for a 2260. That's what you have to do if you want the forend. The other option (sans forend) is to get a 2300 instead, because it is basically a CCS 2240. The longest barrel available on them is 14.6", so you would have to replace the barrel if you wanted it longer.

A better starting point would be the 2400KT from the Crosman custom shop, it would even be cheaper as Jason and i discussed earlier in the thread.

The 2400KT is the one I was referring to. A 2300KT is easier to add a bottle.

Can you fill me in on what it is about the 2400 tube that won't allow it to be pressurized?  I'm seriously considering building another, this time holding to the goals I originally set out and the 2400 otherwise looks like a good starting point.

It's not that the 2400KT tube can't be pressurized; there's not enough tube beyond the barrel band to remove the threaded portion, and the forend makes it difficult to relocate the band.