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, however this spread is still less than that of the 10mm SMG (as of patch 22.214.171.1242). It is also one of only three fully automatic weapons which are capable of being silenced, (the silencer is not to be confused with the 12.7mm pistol silencer, as they are not interchangeable), the others being the silenced .22 SMG and Sleepytyme (GRA).
Unlike 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 other 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 SMG and 9mm SMG.
Bloodborne Cave - behind a very hard locked gate near a trunk holding just under 8000 caps. There is a key to the gate lying by the campfire in the back of the cave (be wary of the tripwire behind the gate).
Great Khans have been observed having the weapon on them in relatively low condition at higher levels.