This DUTY ONE Blowback version is fully licensed by the famous small arms manufacturer STI® International, based in Texas, USA. UU The 4.5 mm steel BBs (.177) are stored in the drop-out charger and are fed with a 12 g CO2 capsule that is intelligently kept in the grip of the gun thanks to the easyload system. The air gun is semi-automatic and is based on the classic 1911 model, but STI® has updated and changed the design and many of the functions. The body has an integrated front rail weaver. The handle is marked with a STI® logo and the castor tail ensures a perfect hold. In addition, the gun has a unique serial number and the metal slide has genuine STI® markings. FEATURES Length: 220 mm / 8.8 inches Cannon length: 115.5 mm / 4.7 inches Capacity: 20 shots Standard Charger: ASG16731 Hop up Type: No Speed: 121ms / 397fps Weight: 825gr / 1.8lb Energy: 2,6 joules Compressed air - CO2 - STI International - ASG - Blowback - Rail - Metal slide - Easyload - Unique serial number - DUTY series - Black - 0.177 / 4.5 mm -> 2J-3J