"Bang" rule if you're below MED distances and get the jump on your opponent first. If they don't call themselves out then you can shoot them.
Grenades (depends on grenade rules and such)
Rubber Training Bayonets/Knives
Sometimes throwing BB's at your opponent or using a McD's straw and firing a BB from that.
BB Claymores, BB Showers, BB Mines (or "flour" mines), etc.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE