They already have a o-ring kit, I got one. Just call them up,plus alot of the o-ring can be found at any hardware store. The guy who made the gun said he more or less built it at Lowes.
-Grey FEP Quest #782
1 of 7 White Grips-Platinum Gold Member bolt
Hater chip -Snatch pin- NDZ on/off-Lazer eyes
-Dust Black Quest
Black Cylon rail-NDZ on/off-Black Snatch Pin
NOX chip-CP Reg-Platinum Gold Member bolt-Lazer eyes