.45 AP Silencer

 is a weapon mod for the .45 Auto pistol added in the Fallout: New Vegas add-on Honest Hearts.

Effects
Attaches a silencer to the barrel of the .45 Auto pistol, which compacts and reduces most of the noise generated by weapon when fired. A small downside is that it slightly obstructs the player's view while aiming down in Iron Sights mode, though this usually isn't a problem. it can be somewhat detrimental to your accuracy at longer ranges, but since the auto pistol isn't a technical long range weapon, the player could revert to using a Hunting Rifle, Varmint Rifle or Anti Materiel Rifle.

Locations

 * Can be purchased from Joshua Graham in Angel Cave.
 * Can be purchased at the Gun Runners (with the Honest Hearts add-on installed).

Behind the Scenes
The suppressed gunfire shares the same sound emission with the Infiltrator and Perforator, which were cut from Fallout:New Vegas. Instead, the Infiltratir is seen in Mick's Secret Weapon Stash at Mick and Ralph's.