12.7mm SMG Stacked Magazine

 is a weapon mod for the GRA 12.7mm submachine gun in the Fallout: New Vegas add-on Gun Runners' Arsenal.

Effects
Increases the magazine capacity of the GRA 12.7mm submachine gun. This mod causes the magazine of the gun to extend further along the the top of the gun.

Location
Sold by Vendortron at the Gun Runners (Fallout: New Vegas)

Sold by Traveling merchant