These are just the ones they know for sure are in game but there are more weapons that havent been announced or confirmed yet 

YES THIS IS COPY AND PASTED. So far its looking like there will be a lot more tools for the slaughter this time around and this are only the ones that have been confirmed. there are likely more coming. 
 
ps. now with armors posted 

 

 Pistols

• 9mm Pistol
• Virgin Mary Pistol XD MINE
• .357 Revolver
• Weathered 10mm Pistol

Rifles

• Anti-Materiel Rifle
• Varmint Rifle
• Hunting Rifle
• Military Assault Rifle
• Trail Carbine
• Sniper Rifle

• All-American
• Camouflaged Rifle ALSO MINE
• Battle Rifle
• Semi-Automatic Rifle
• Cowboy Repeater

SMGs

• Cyberpunk Cowboy SMG
• 10mm SMG

Shotguns

• Shotgun
• Riot Shotgun
• Caravan Gun

Machine Guns

• Light Machine Gun
• Minigun

Energy Weapons

• Portable laser beacon
• Plasma Caster
• Flamer
• Gatling Laser

Explosives

Projectile

• Grenade Machine Gun
• Missile Launcher
• Fatman

Thrown

• Dynamite

Placed

• C4

Melee Weapons

• Sledgehammer
• Super Sledge
• 9-Iron
• Nail Board
• Concrete Club
• Machete
• Razor
• Boxing Gloves     
   
  Armor
• Combat Armor
• Desert Armor
• Leather Armor
• New California Ranger Armor
• Ceasar's Legion Armor

 Clothes

• Cowboy Outfit
• Merc Adventurer Outfit
• NCR Uniform
• Petro-Chico Jumpsuit
• Powder Gang Uniform
• White Cowboy Suit
• Black Tuxedo
• Pre-War Outfit

Vault Jumpsuits

• Vault 21 Jumpsuit
• Armored Vault 21 Jumpsuit
• Armored Vault 13 Jumpsuit
• Vault 13 Jumpsuit

Headgear

• Combat Helmet
• Desert Helmet
• New California Ranger Helmet
• Pre-War Baseball Cap
• Straw Hat
• Red Beret
• Green Beret
• Black Cowboy Hat
• Pith Helmet
• Ceasar's Legion Helmet
• Metal Helmet

Eyewear

• Mirrored Sunglasses        

 
whats your favorite gun and outfit

Some of the weapons look really out of place. Such as the "Camouflaged Rifle"

I preferred to use melee weapons and explosives in FO3 so I'd say the Grenade Machine Gun, the Concrete Club and Dynamite while wearing the white cowboy outfit and the cesar helmet.