Excellent quality in an economical package, UHC's USP style Model 161 non-blowback gas pistol is the answer for anyone getting into airsoft. Durable ABS plastic construction with a fixed hop-up designed for use with .20g BBs. Due to it's non-blowback nature, this airsoft pistol is extremely conservative on green gas while remaining accurate. Muzzle velocities range from 280-300FPS with .20g BBs. Comes with one 15 round magazine.Only use high grade .20g or .25g BB's for best result! Don't use .12g BB's as they may cause damage to the hopup and void your warranty. For best performance, use Green Gas!