I've been working a month on it, but here it is, my Fallout 3 weapons pack is here. Check it out here. It comes with 40 (+) new weapons for the game, all custom models/textures/sound.

That includes:

.357 Taurus
A35 MGL
AK47
AR-10 (Sniper rifle version)
Barret M82 .50 BMG
Beretta M92 (unique variant included)
Colt M1911 (unique variant included)
FN FAMAS
Franchi Spas 12
G36E (STALKER style ;D)
Glock 18c
HK G3A3
HK MP5A2 (unique variant included)
HK MP5k
HK USC.45 (unique variant included)
HK XM8 (unique variant included)
IMI Galil
Ingram Mac10 (unique variant included)
Iron Ridge Steyr TMP
Klin PP-9 (unique variant included)
M16A4
M249 SAW
M4A1 Carbine (unique variant included)
M60 "The Pig"
RPK
Steyr Scout
Streetsweeper Striker 12
Suppressed Skorpion vz.61
Taurus Raging Bull
Thompson M1A1