The KWC Sigma SW40F CO2 Blowback BB Pistol is a replica of the real steel S&W Sigma with the exception of the licensing. You can field strip this gun exactly like a real Smith & Wesson Sigma. All the mechanical parts work just the same. The trigger pull on the KWC Sigma SW40F CO2 Blowback Airsoft Pistol is single action only which generally produces a very light trigger.