Tfogger, could you clarify this?

Quote Originally Posted by TFOGGER View Post
I think you could successfully argue that a 9mm mag is not a functional device for feeding .22 into a semiautomatic firearm. The problem with mags marked .50 Beowulf is that possession of them while simultaneously owning a .223 rifle would be "constructive intent", somewhat like having a 7 inch AR barrel, but no pistol lower, and no SBR stamp.
I see why the 7" + no pistol lower + no stamp indicates intent, but why would .50beo mags + .223 AR = intent if we don't specify that there is no .50beo lower? What if the suspect has a multi-cal lower hanging out? Couldn't he just buy pmag bodies for his big bore build without constructive intent?

Correct me if I'm wrong, the three calibers in discussion are all 10 round capacity in standard AR mags, not 15, yes?