Mach Sakai checks out the BATON Airsoft USMC M45A1 CO2GBB Pistol that is available for some time now and the "CO2GBB" is a trademark of BATON Airsoft. This pistol is based on the M45A1 pistol, a .45 APC pistol used by the USMARSOC. This has an under rail for weapons accessories and obviously, is CO2-powered.