it is a kind of active repeater that uses IF process...
It depends on what kind of ammo.
the m16 uses 5.56 caliber ammo
what kind of pistol is it?
Nuclear Fallout comes from a nuclear power plant.
fallout 3, it depends on what kind of games ur into
almost every kind of 7.62x39mm
22LR
9mm rounds.
30/06
.380 ACP
The caliber of the firearm should be stamped on the barrel.