I thought yuki's solution met that criteria. It is only renaming the two existing weapons, so no new weapons are being implemented? If the .308 cal rifle is left as is, and only the FO3 .32 version gets a color change/new skin to the exiting model, the .308 (NV weapon) isn't being modified, and very little is being changed on the .32 rifle? His solution also seems logically sound, given the naming conventions of the other weapons he mentioned. I'm not trying to be argumentative, but I don't see exactly where it is violating the standards you have set.
On a separate note, I understand one of the concerns listed before was that so few weapons were using an ammo type, either just the two .32 weapons or just one (the pistol) if the rifle is kept as the FNV version. I just wanted to mention that the BB gun is the only weapon to use it's ammo type, same with the Railway Rifle, Nail Gun, Dart Gun, Missile Launcher and the Fat Man. (Unique versions wouldn't count I'd think, but even so there are unique versions of the .32 cal weapons.)
I guess another thing I don't understand is how the FNV Huning Rifle is statistically superior the .32 Hunting Rifle of FO3, but the FO3 version is considered overpowered?
.32 Hunting Rifle, 25 dmg/attack, 18.8dps, 25 crit dmg, x1 crit multiplier, 0.8 atk/second, 25AP, 0.3 spread
.308 Hunting Rifle, 52 dmg/attack, 49.3dps, 52 crit dmg, x2 crit multiplier, 0.9 atk/second, 40AP, 0.01 spread
From these stats, the FNV .308 is about twice as powerful in most categories as the FO3 .32. The only place where the .32 really has the advantage is in AP cost. Am I missing something?