ASG M925FS Full Metal Gas Blowback Airsoft Pistol (BLACK)A version of the classic M9 models with metal slide a very realistic feeling and handling. Gas operated semi automatic blowback with adjustable Hop up and a double stacked magazine that holds 25 BB's note that a Co2 magazine is available for this model (ASG 16863). Specifications Brand: ASG Operation: Gas Blowback Material: Metal Slide, Frame, and Barrel Firing Modes: Semi Automatic Muzzle Velocity: 300 320 FPS (w 0. 20g BBs) Magazine Capacity: 25