We Tech M16A3 Open Bolt Full Metal Gas Blowback Airsoft Gbbr Rifle (Black)Specifications: Brand: WE Tech Operation: Gas Blowback Material: Metal Upper & Lower Receivers, Outer Barrel, Carry Handle Polymer Stock, Pistol Grip Firing Modes: Semi Automatic, Full Automatic, Functional Safety Muzzle Velocity: 410 480 FPS (w 0. 20g BBs) Magazine Capacity: 32 Rounds Hop Up: Yes, Adjustable Propellant: Green Gas Outer Barrel Length: 19" Inner Barrel Length: 509 mm Length: 39" Weight: 8 lbs Color: Black Package Includes: 1X Rifle, 1X