Strike Industries ARK CO2 BB Pistol Uses .177 caliber BBs 17+1 round magazine Blowback action Max. velocity: 390 FPS ARK fluted outer barrel M14 x 1 Threaded outer barrel end for moderator Adjustable hop-up Textured grip Ridged undercut trigger guard Fixed front blade sight Fixed rear notch sight Weaver under-muzzle accessory rail Available in black or dual-tone Barrel length: 3.7" Overall length: 8.66" Weight: 13.8oz Officially licensed from Strike Industries Powered by a single 12-gram CO2 cartridge