Umarex StrikeForce Full Auto BB Rifle Full or semi-auto .177 caliber Matte black stock Max. velocity: 450 FPS 30-round drop free magazine Adjustable buttstock Includes 3 interchangeable backstraps Full-length Picatinny optics rail Removable adjustable fiber optic flip-up front and rear sights M-LOK slots on sides and bottom of handguard Front and rear quick-disconnect sling mounts Barrel length: 10" Overall length: 27.1" buttstock collapsed, 30.25" extended Uses two 12-gram CO2 cartridges Includes speedloader