The S95 Assault SMG is a Fallout-ized MP5, based on the Hk54 prototype, albeit with bakelite furniture and the R91-style simplified receiver.
It can be upgraded with a stock, suppressor, and foregrip.
The R93 Heavy Assault Rifle is a .308 weapon, with combined features from the G3 and Madsen LAR, just to give it some unique character and more of a retro style.
It can be upgraded with bakelite furniture, a scope, and a muzzle brake.
The R93 Strongarm is a unique shortened variant with a modified gas system, muzzle brake, extended magazines, and some S95 furniture.
No, I am not familiar with modeling and have other things on my plate. If these ideas are circulated widely enough in the community though, someone who already makes mods might take it up.
I only wish Bethesda would stay consistent on the Old World standard service rifle.