Legends M3 CO2 Grease Gun .177 caliber Full-auto or semi-auto modes Blowback action Full-metal construction 60-round drop free magazine Max. velocity: 450 FPS Approximately 120 BBs (2 magazines) per full CO2 charge in full-auto Cyclic rate: 1,025 BBs per minute 3-position manual safety Peep-style iron sights Flip-open dust cover Collapsible wire stock Thumbhole charging slot on bolt Uses two 12-gram CO2 cartridges