I've been wanting to build a tanker for awhile. I decided to build a 9mm tanker carbine. I've only got to do a little testing but not to bad for a low powered thumper bottle buster. It has a 16.5" .356 barrel. Modified crosman breech with pictany rail. Full barrel shroud is 1.0 OD. Rear cocking assembly. It has an older 13XX trigger group that I refinished. The trigger group came out really good shimmed the trigher and has no slop at all. Installed a silver trigger shoe. I think it came out good and fun to shoot.
58 grn Enjin pellets
Av: 556.8
SD: 4.79
ES: 12.85
#1 563.00
#2 556.3
#3 559.3
#4 550.2
#5 555.3
Tank Fill 2800psi End 2400 psi
Tank Reg out put psi 1100 psi
I did shot one 75 grn WC and it was 500 fps.
Could juice this thing up a bit but I'm going to have to get some bevelled spring for the regulator to increase the PSI.
By the way this gun will be up for sale shortly
Thanks
Sean Stephens
workinmanVA