Use Terrorist only guns to kill Counter-Terrorists and vice versa. Terrorist only weapons are the Glock, Tec-9, Sawed Off Shotgun, Mac-10, Galil, AK-47, SG 553, G3SG1, and Molotovs. Counter-Terrorist only weapons are the P2000, Five-SeveN, MAG-7, MP9, FAMAS, M4A4, AUG, SCAR-20, and Incendiary Grenades. It will be easier to find AK47s and M4A4s.