The Maverick M4A1 Carbine, often referred to as the M4, is an assault rifle featured in the Counter-Strike series, exclusive to the Counter-Terrorists. The counterpart for the Terrorists is the AK-47. In Counter-Strike: Global Offensive, it was replaced by the M4A4 but was reincarnated in the Arms Deal update as the M4A1-S, taking up the same slot as its replacement.