That might be something to do!

I think i'll just use 22 mm copper for the pump, I rather keep my steel for other purposes.
At 11 bar my design gives about 500 joules with a 1m 26mm barrel, and a 20 gram projectile. Should be a lot of fun to shoot

I will use a little CampinGaz bottle for the chamber, it has been tested up to 15 bar, but I think it will be able to take much more.
Moah pressure is Moah noise+Moah powah=Moah fun!
Best thing it is completely legal now i'm 18
