Infiltrator (Fallout 3 DLC The Pitt)

The Infiltrator is a silenced and scoped assault rifle. Its appearance consists of a black paint finish, a scope, and is basically a shortened and stock-less variant of the R91 assault rifle that was standard-issue for the National Guard at the time of the Great War. Similar to the R91, the Infiltrator fires 5.56mm rounds and utilizes a 24-round magazine, however its magazine is noticeably larger than a standard R91.

Despite its scope, the Infiltrator still suffers from the typical inaccuracy of assault rifles at long-range combat, limiting its suitability only for short and middle-range combat. It is one of the favorite weapons of the Pitt raiders in The Pitt and in 2281, Mick is known for having one in the collection of his secret arsenal in Freeside.