12 ga upper that fits large frame AR!

[SinistralRifleman]

20 gauge magazine fed shotgun is not on any federal radar screen, like the 12 gauge???

The Gun Control Act of 1968 states that any firearm with a bore over 1/2" is a destructive device except for shotguns with sporting purposes. Sporting purposes = hunting, trap and skeet to the .gov. Action Shooting Sports are "paramilitary games" according to court documents where this issue was previously raised, not sporting purposes.

The Secretary (of the treasury, which BATF was originally under) can declare any shotgun non-sporting at any time by make and model number; making it a DD. A 20 gauge still has a bore over 1/2" and could still be made a DD.

There were several criteria that went into declaring the USAS-12 and Striker 12 DDs. One was weight, they were deemed too heavy for traditional sporting purposes. Another was appearance. Magazine capacity was also a concern; there were no 5 or 2 round mags available making it usable for hunting.

If a company were to market a mag fed shotgun and only sold it in a configuration suitable for Deer or Duck hunting, I don't think it would be made a DD. A manufacturer cannot be held responsible for the accessories other companies make for it. If this were the case, we'd already see Saiga-12s declared DDs.

[SN13]

It also helps that they come without evil pistol grips!