Yeah. Maybe i am overreacting, but I don't know that there is a retail sale requirement to trigger a stop import on LPS ball ammo. I believe that there only have to be pistols out there firing the round. There will probably be some person who will be all to happy to point out the existence of these pistols being in existence to the ATF generally. That is why NFA trusts are going to be regulated away, people not leaving well enough alone and pointing out gray areas to the bureau. It is like an accountant finding a new tax shelter and asking for an IRS opinion beforehand. I have more than a few Finnish Mosin Nagants. I think the idea of having an Obrez is appealing. The idea of having a red-headed girlfriend 10 years younger than me is also appealing, but is not a good pursuit for a married man. Particularly given the current Administration, I think the pursuit of a novelty at the hazard of an LPS ban is rather selfish.
I believe the Law Enforcement Officer Protection Act covers projectiles "which may be used in a handgun." SS-109 is specifically exempt, that is why the attempted ban due to ar-15 handguns being out there would likely have been found illegal. Not the case with LPS in 7.62x54r or 7.62x39. The only thing that keeps steel 54r coming in is the absence of handguns. The law, as far as I can read it, does not require that the pistol be sold, just that it be out there.