Line SI Promaster. My fourth Promaster features a custom made powerfeed snub which accepts WGP Auto-cocker threaded barrels, a cosmetically modified WGP Sniper barrel, TASO hi-flow Spyder valve and valve pin, Shocktech Spyder valve chamber extension (inside the foregrip), 16 oz. anti-siphon Co2 tank with a CMI CO-2000 regulator/pin valve, B-square Ruger Mark II Weaver sight rail, Tasco 30mm red dot sight, AR-15/M4 style foregrip, and AR-15 magazine along with some cosmetic body work.