12.7mm SMG Suppressor

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

Effects
This mod decreases the sound made by the weapon, allowing you to stay hidden while shooting.

Location

 * Sold by Vendortron at the Gun Runners.
 * Sold by Alexander at the 188 trading post.