just curious, mine are
AR: AK-12 because 60 rounds and more mods
semi: M110A1 because M82A1 recoil is too much and more mod than vepr
bolt: SV-98 because it's the only available thing in the shop
SMG: XV ACP, just because. maybe because more and better mods than scorpion?
shotgun: M12 because fastest reload and because origin isnt available in the shop
pistol: cheapest, i use them to smack monsters.
MG? not available in the shop
melee: spear because hammer is too slow
I don't use refinery weapons because of the hassle of collection stuff