How To Unlock: Kill 250 people using pistol. (Multiplayer)
For this trophy you have to kill a total of 250 people with a pistol in the game's Multiplayer mode. Pistols are the main close range weapons in the online mode, so you should get this trophy while going for the 2000 online kills. Remember that only Ranked Kills count towards the total. See Supplier of Death
Note: the Pistol kill stat bar can sometimes glitch, and not record kills. To stop this happening, always start with a few rifle kills. Then swith to the pistol. For some reason, the stats don't like continuous pistol kills alone.