Nah....what they will do is control ammo. Making the gun is just mechanics. Making the ammo requires some pretty sophisticated chemistry, both for the propellant(powder) and for the primers. And some very strong safety procedures to keep from blowing oneself up. Which is why B.L.O.A.T. (buy lots of ammo today) is the most important thing to do.
Concur on cartridge production being the weak link.
Besides BLOAT, I subscribe to the multile caliber theory.