The Vault - Fallout Wiki

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The Vault - Fallout Wiki
Icon disambig.svg
This page is about weapon that appears in Fallout 3. For the perk that appears in Fallout 3 and Fallout: New Vegas, see Infiltrator. For an overview of other assault rifle models in the Fallout series of games, see assault rifle.
Infiltrator (weapon).png
Infiltrator icon.png
SkillSmall Guns
Attack statistics
7 (12.4)
56 (98.8)
DPS (reload)
33.6 (59.3)
Crit Dmg
Crit % Mult
Ammo & reloading
Ammo Type5.56mm round
Ammo Cap.24
Reload Time
Item HP300
Assault rifles
QuestsUnsafe Working Conditions
Mill Worker
Editor ID?
Base IDxx00737c
Perk Effects
Perks (dam.)
Gametitle-FO3 TP.png
Gametitle-FO3 TP.png

The Infiltrator is a weapon in the Fallout 3 add-on The Pitt.


The following section is transcluded from assault rifle. To modify, please edit the source page.

Manufactured by civilian defense contractor Stent Security Solutions, the R91 assault rifle is a conventional design chambered for 5.56mm ammunition. Employing a roller delayed blowback system, it is a very sturdy design, with simple iron sights that consist of a rotary rear drum and hooded front post, a fire selector switch with three settings (safe, fully automatic fire, single shot), and a flash suppressor. The final touch is the wooden stock and handguard.[1][2]

The R91 was manufactured by Stent as part of its R series, superseding the manufacturer's own M series of combat assault rifles in the early 21st century. While other models and variants were developed, the R91's combination of ruggedness, firepower, and low manufacturing costs resulted in its adoption as an assault rifle of the National Guard and issuance to troops on the Anchorage front.[2][3]

The number of working units is particularly high in the Capital Wasteland, as the National Guard units deployed there used it widely. It remains a popular sight among the inhabitants of the region, particularly slavers and raiders, though it is also available for purchase from traders and weapon dealers.[2] This weapon is the carbine variant of the R91 assault rifle. Its modifications, including an extended box magazine, suppressor, scope, and lack of stock, suggest it was created to be used for special operations forces. The weapon fires 5.56mm rounds and utilizes a 24-round magazine.

Despite its scope, the weapon still suffers from the typical inaccuracy of carbines at long-range combat, limiting its suitability only for short and mid-range combat. It is one of the favored weapons of the raiders in The Pitt and in 2281, Mick is known for having one in his secret collection in Freeside.


Infiltrator expanded

The Infiltrator is a suppressed and scoped assault rifle; shortened from its lack of a stock. It is a second-tier, special purpose automatic firearm. It has the lowest DAM and DPS of any weapon in the assault rifle class but the integral sound suppressor permits repeated sneak attacks, while the scope permits enhanced spotting (though not necessarily accuracy). The Infiltrator's AP cost, spread, magazine capacity, and critical multiplier are identical to that of assault rifles.

Despite this weapon's scope, it still suffers from the typical inaccuracy of assault rifles. Combined with the fact that each bullet doesn't hit particularly hard, this weapon is not viable for long distance fighting. On higher difficulties, the Infiltrator's low damage outweighs its firing volume benefits. However, due to the silenced nature of the gun, one can get several sneak attack criticals on a group before they know what hit them.


  • Assault rifle, an unsupressed, unscoped variant.
  • Perforator, a unique variant of the infiltrator with more damage and less spread, but a slower rate of fire.


Name Type Dmg/shot DPS Att/sec Crit mult Crit dmg Spread AP cost Ammo Ammo cap Weight Item HP Value Notes
R91 assault rifle Automatic rifle 8 64 8 x0.13 8 1.5 23 5.56mm round 24 7 300 300 -
Infiltrator Automatic rifle 7 56 8 x0.13 10 1.5 23 5.56mm round 24 7 300 400 Scoped; suppressed
Perforator Automatic rifle 10 60 6 x0.33 14 0.5 23 5.56mm round 24 7 300 600 Scoped; silenced


  • It is wielded by the last enemy the player must fight, Gruber, in the Hole, the combat arena of The Pitt.
  • At the entrance into The Pitt's Downtown area, past The Pitt bridge, two Pitt raiders and their chief Mex stand guard. They all carry Infiltrators. Note that Mex can also spawn a normal Pitt raider weapon, but will carry the Infiltrator regardless.


  • An Infiltrator can fire 1424 rounds, or about 59 magazines, before breaking. That's 427 rounds more than the Perforator, and 177 rounds more than the assault rifle.
  • Fallout: New Vegas includes a brief appearance of the Infiltrator, seen on one of the side walls of the "hidden" weapons room in Mick & Ralph's. It is a non-interactive static mesh acting like a decoration.



SingleShotVB.png ReloadVB.png


  1. Weapon appearance and patterning after the CETME C rifle.
  2. 2.0 2.1 2.2 Citadel terminals; Terminal, R91 5.56mm Assault Rifle
  3. Appearances in Operation Anchorage, and Mothership Zeta.