H&K USP CO2 Airsoft Pistol Authentic H&K replica Uses a 12-gram CO2 cartridge .6mm caliber airsoft pistol 16-shot drop-free magazine Fires up to 360 FPS with 0.20g BBs Fixed tactical front and rear sights Built-in hop-up system Metal internal parts and barrel for added realism Integrated accessory rail Manual safety 7.5 inches overall length