Well this is an instant follow.
I was surprised to see both the SPAS-12 AND the USAS-12 in this mod, though as per usual with a lot of the former, I was disappointed that the ol' SPAS was being treated purely as a pump gun. At that point, it's not a SPAS anymore. It's just a skin for any other generic pump action.
Big agree on Super Shotgun = Faster Fire Rate, though. USAS-12 stronk. Love it.
Also love the SMGs. Fast and powerful!
Grenades over rockets is good for slot 5. I always get twitchy when I hit something that isn't tank-adjacent with an anti-tank round and it's still there. That said, the damage should probably be notably higher than a shotgun. With how slow it is to fire, something like ~300 damage on a direct hit might be reasonable? Cutting ammo capacity would be a decent balance option, too.
Flamethrower is very short-range, but it doesn't suck. Good job!
The Oppenheimer is everything I want an actual rocket launcher to be and then some. Sweet Land of Liberty.
Looking forwards to future works! You've got talent!