Crossfire M4 Shooting is an online game at 43g.Com. You can play Crossfire M4 Shooting in your browser for free.M4A1 carbine, a derivative type of M4 carbine, is used as special operational weapon and is the current main equipment in the conventional forces and special forces. People love it! Hope I can satisfy you with this collection of M4a1. Come on, challenge a high score!