Without Mods or Hacks, the guns that kill the fastest are probably the Shotguns. As you know, the Spas-12 (the first shotgun in that section) can kill in one hit). It is probably the case with the Ranger and 1887s too. However, AA-12, Striker etc. take more than one shot to kill.
Gali
hammer
try shooting him with your gun
you keep shooting him with the ray gun
black ops
Call of Duty Black Ops
nothing
You cant exactly make a gun in black ops, but you can customize a gun in multiplayer create a class mode and play online (or offline) with the customized gun.
Thats not on Black Ops
The 12th gun you get in gun game is the HK21
no
Dragunov.
eeewr4r
Not really. It's a game about violence and shooting people. If you don't like violence and shooting, the Black Ops series is hardly a good game choice for you.