Here is a list of weapons that can be traded for artifacts with Vorin in the Garbage. If any are missing & there probably are please add them.
AK-74u
Desert Eagle (MK v11)
Aria Vintorez PSO-3
Expert Shaft PSO-1
FAMAS Prototype
Franchi SPAS-12 Hunter
Gauss Rifle
HK XM8 Para
Knights SR-25
Mosin M1891
PPSH-41
RPG-7
Stechkin
SVD 'Dragvnov'
Winchester 1300 Chaser
StalkerSoup-Weapons For Vorin
AK-74u
Desert Eagle (MK v11)
Aria Vintorez PSO-3
Expert Shaft PSO-1
FAMAS Prototype
Franchi SPAS-12 Hunter
Gauss Rifle
HK XM8 Para
Knights SR-25
Mosin M1891
PPSH-41
RPG-7
Stechkin
SVD 'Dragvnov'
Winchester 1300 Chaser