The VFC Avalon M4 SOPMOD carbine is spot-on-- spot-on in the details so you can be spot-on on the field.Standard A2 style front sight. The M4 SOPMOD airsoft gun is equipped with an upgraded MOSFET and the tough Avalon ECS gear box. This AEG is best powered by an 11.1v LiPo battery (not included) and can accept most standard M4 style mags. Expect .20 gram BBs to fly from the Elite Force M4 SOPMOD at 390 FPS.