12.7mm Pistol

The  is a weapon in Fallout: New Vegas. It is similar in appearance to the 14mm pistol, but is chambered for a smaller round.

Characteristics
This weapon fires 12.7mm rounds, which are approximately the size of .50 caliber rounds. According to J.E. Sawyer, it is modeled on the 14mm pistol and is a similarly powerful weapon.

12.7mm/25.4mm (MM in an inch)=.50in (caliber is measured in inches)

Appearances
The appears in Fallout: New Vegas, but is based on the 14mm pistol from previous Fallout games.