Tactical M4 Carbine [Grand Theft Auto: San Andreas] [Mods]
GTA: Which is best M4? (GTA3, GTAVC, GTASA) | Dream Gangsters Gaming - YouTube
M4 GTA SA - M4A1 - Counter-Strike: Global Offensive - Weapon models - Source Warehouse (HL2) - this is a port of the m4 or m16 of gta sa (the game says it's an m4)