OK so I heard Mick at Mick & Ralph's sells weapon mods, so I'm there, but I don't see any weapon mods. Can anyone tell me where exactly to find weapon mods and what they are named as in the buying screen?

Vendor lists are random. Come back later.

They are in the misc tab. They are named what they are - IE, 9mm Pistol Scope, .357 Barrel Extension

Ok thanks for the quick answer. :]