Barrel: 15.5mm x 1.2m, 1:30 rifling (ammo; wadded marbles)
Chamber: 15.5mm x 80cm
Operating pressure: 120-400 psi
Blowgun porting, male QD for filling, with a built in internal check valve
I made a hand pump for it, which will easily reach 400+ psi, but takes far too long to bring the gun to pressure. So I'm going to buy a 260 psi track pump and use that..
Any questions? By the way I'm going to make a nice handle for it..