What is the best gun on Black Ops 2 zombies? The XPR-50’s rate of fire is above average for the sniper rifle class. The XPR-50 is a moderate damage sniper rifle. The Knötgen automatic rifle is a two barrel, magazine fed light machine gun using a delayed blowback operation. The Knötgen automatic rifle is a two barrel automatic rifle of German origin. The Beretta 93R is an Italian selective-fire machine pistol, designed and manufactured by Beretta in the late 1970s for police and military use, that is derived from their semi-automatic Beretta 92. This fire rate can be improved through Rapid Fire. Being a bolt action weapon, this is to be expected, firing at 57 RPM, or just under one shot per second. The Locus is a bolt-action sniper rifle which can kill any enemy with one shot to the upper torso, neck, and head. It has unlimited ammunition in the campaign and Survival Mode. The B23R appears in Call of Duty: Strike Team as the Beretta 23R. What are all the guns in COD Black Ops 2? What weapons are in the Black Ops 2 Mystery Box?.What is the best gun on Black Ops 2 zombies?.What are all the guns in COD Black Ops 2?.