This replica is an enhancement of the original gas M1911 Green Gas Full Metal Airsoft Pistol. Unlike it’s predecessor though, this model features Blow Back feature which is propelled by CO2 and user will notice a significant kick from it’s operation.. This enhances not only the realism of the design, but the overall experience of shooting as well. Fashioned with decorative finishing of the original .45 from Colt, the overall appearance is immaculate. Exceptional quality and adherence to detail make this one of the most realistic airsoft guns in the 1911 category available today.