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 does not affect the appearance of the weapon.

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

Sold by Traveling merchant