More common at higher levels, the 12.7mm submachine gun is a heavy-duty large-caliber submachine gun (SMG). It features an unconventional top-mounted magazine, which lies parallel to the weapon's barrel. It boasts a high damage-per-second but suffers from a small magazine capacity and a fairly large spread.
Unlike most other submachine guns, the 12.7mm submachine gun is classified as a two-handed weapon; because of this, traveling with the weapon unholstered will slow the player character's movement speed. This also causes the weapon to be holstered on the back, rather than on the hip as with most SMGs. This also affects it with regard to the Jury Riggingperk, putting it in the same repair class as the service rifle and light machine gun, instead of with one-handed automatics like the 10mm and 9mm SMGs.