Fallout New Vegas has hands down the best selection of weapons and equipment ever thought up for a video game which is no surprise because one of the creators of this game is a huge gun collector and is rumored to be an ARFCOMer. No one but a firearms enthusiast would include such a variety of weapons, ammo and equipment in their videogame.
The game features firearms for WWII, Vietnam, The Old West and the Modern Era. In addition the game features such equipment as night vision goggles, SWAT body armor, body armor similar to Aliens Colonial Marines and even the pistol from Blade Runner.
WWII Era Weapons in the Game
The M1 Garand= The Battle Rifle and This Machine
The M1 Thompson Sub-machine gun= .45 Auto Submachine Gun
The 1911= .45 Auto pistol
The Browning High Power= 9mm pistol
The Browning BAR= The Automatic rifle
The M3 Sub-machine gun= The 9mm Sub-machine gun
Vietnam Era Weapons in the Game
The M16 A1= The Service Rifle
Colt CAR-15 / XM-177 Commando= The Assault Carbine
The M79= The Grenade rifle
The M60= The Light Machine gun
The Navy SEAL China Lake Grenade Launcher = The Grenade launcher
The Claymore Mine= Bottle-Cap Mines
The M40 sniper rifle= Fully Modified Hunting Rifle
Modern Era Weapons in the Game
The .50 PGM UR Hecate II AMR= The Anti-Material Rifle
M4 with ACOG= The Marksman Carbine (has 4x power scope)
Mk 12 Special Purpose Rifle= The All-American (has 8x scope and is match accurate)
Alexander Arms .50 Beowulf= The Survivalists Rifle
M134 Minigun= The Minigun
Colt Commander 1911= A Light Shining in the Darkness
Remington 870= The Hunting shotgun and Dinner bell
Armsel Striker shotgun= Riot shotgun
Smith & Wesson Model 29= .44 Magnum Revolver
Smith & Wesson Model 28= Police pistol
454 Casull= Hunting Revolver
Milcam HB= Varmint rifle
Old West Era Weapons in the Game
Colt Single Action Army= .357 Magnum Revolver, 45.70 Ranger Sequoia
Winchester Model 1873 rifle= The Cowboy Repeater in 357, Trail Carbine in .44, The Brush Gun in 45.70
Winchester M1887 lever-action shotgun= The Lever Action Shotgun
Side by side 12 gauge= Sawed-Off shotgun
Weapons with a unique look that fill a similar role to modern weapons.
.50 Desert Eagle= 12.7mm pistol and Li’l Devil (cut down 12.7mm pistol)
10mm MP5= 10mm submachine gun
MP5-SD= sleepytyme
HK Mk 23 SOCOM= The 10mm pistol fully modified (silencer, laser, extended mags)
Each of these weapons has certain modification such as silencers, scopes including a night vision scope, custom actions, custom stocks and a shit ton of other cool mods.
Each of these firearms has a variety of different ammunition types, JHPs, JFPs, Match rounds, +P rounds, magnum rounds; shotguns have magnum rounds, bean bag rounds, dragon breath rounds, and others.
For instance the .50 has
.50 Armor piercing
.50 Incendiary rounds
.50 Match rounds
.50 Raufoss Mk 211 (exploding)