The Airsoft Surgeon Adjustable FPS Enhanced Nozzle Set was made specifically for the RWA / KWC / Cybergun / Elite Force Co2 1911 GBB Pistol series as it was designed to reduce or increase the FPS of your pistol by adjusting how much gas proceeds through the nozzle itself. Hugely convenient for those that wish to keep it CQB friendly has KWC 1911s can generally shoot at around 400 fps.
Elite Force 1911A1 / Elite Force 1911 Tac
RWA SPS Falcon / RWA Nighthawk
KWC Licensed Colt M1911 WWII / KWC BLACKWATER R2ELITE FORCE
KWC COLT 1911 Rail Gun (Black, Stainless. Dual Tone, M45A1)