MP5SD6 - 889 damage = 13-14 hit kill AK-74 Kobra - 2722 damage = 4-5 hit kill CZ550 - 8000 damage = 2 hit kill I would drop the MP5SD6. Low damage, short range, and rare ammo. The Kobra and the CZ would give you the best of close, mid, and long range, while maintaining more common ammo types.