Gunslinger

 is a Fallout 3 and Fallout: New Vegas perk.

While using a pistol (or similar one-handed weapon), your chance to hit in V.A.T.S. is increased by 25%. As with all perks that increase your chance to hit in V.A.T.S., this bonus is multiplicative, not additive.

Affected weapons in Fallout 3

 * .32 Pistol
 * N99 10mm Pistol
 * Silenced 10mm Pistol
 * 10mm SMG
 * Chinese Pistol
 * Dart Gun
 * Sawed-Off Shotgun
 * Scoped .44 Magnum
 * Alien Blaster
 * AEP7 Laser Pistol
 * Plasma Pistol
 * Mesmetron
 * Alien Atomizer

Affected weapons in Fallout: New Vegas

 * A Light Shining in Darkness
 * Alien blaster (Fallout: New Vegas)
 * 12.7mm pistol
 * .44 magnum revolver
 * Mysterious Magnum
 * .45 Auto pistol
 * .357 magnum revolver
 * Lucky
 * 9mm pistol
 * Maria
 * 9mm SMG
 * Vance's 9mm submachine gun
 * 10mm pistol
 * 10mm SMG
 * Hunting revolver
 * Laser pistol (Fallout: New Vegas)
 * Pew Pew
 * Pulse gun (Fallout: New Vegas)
 * Plasma pistol (Fallout: New Vegas)
 * Plasma Defender
 * That Gun
 * Recharger pistol
 * Ranger Sequoia
 * Silenced .22 pistol