ukarms red dot version m16 m4 m80b electric airsoft gun aeg rifle upgraded performance 300 fps(Airsoft Gun) Ratcheting Magazine (300 rounds) Muzzle Velocity: 300FPS (.12g) 250FPS w (.20g) Version 2 Gearbox - RED DOT SCOPE INCLUDED 8.4v Battery Pack w/ Wall Charger Metal barrel for improved accuracy