7.62x39 steel core has been banned from import for several years now, and just last fall the ATF banned 5.45x39 steel core 7N6, because of AK style pistols like that. M855 Green Tip is late to the party.
Well, anybody that would try to conceal something like either an AR-15 or AK-47 type handgun would have to be a complete idiot anyway. This is all just BS camel nose under the tent stuff to do backdoor gun control. Even the (honest) cops know that they aren’t in any danger from this stuff.