OK, prior to Oct 1, the MSP said that HBARs were OK and that seems to be carrying over to post Oct 1. Some shops in MD are even selling HBARs and the MSP seems to be not disapproving them.
However, remember that the MSP legally cannot interpret law, only enforce it. Only the AG can interpret laws, but not at Mr. Public's request, only at the request of another MD govt entity - I know, I tried, and that's what the AG told me in writing.
Now, remember the situation about whether the HQL was required for paperwork filed prior to Oct 1 but where the transfer was to take place after Oct 1? The MSP said no HQL was required. A short time after, the AG told the MSP to go pound sand, they were wrong, and that a HQL was required, as the law specifically stated that transfers of handguns after Oct 1 required a HQL and there was no exemption for paperwork filed prior to Oct 1 like there was for the sale/transfer of AR-15's.
If you read the law correctly, the net is cast over all AR-15's as illegal. Then comes the one exception - the Colt Sporter HBAR. This is a reference to a specific manufacturer and specific model of AR with a heavy barrel. If they wanted to exempt all HBARs, then they would have said that, but they didn't.
While I hate the laws as much as everyone else, I think buying any HBAR other than the one specified is a bit iffy in that the AG could again smack the MSP down and say that the exemption does not apply to all HBARs, only the Colt Sporter HBAR. Would the MSP have to go retrieve all of the ones they approved since Oct 1? Possibly, but I doubt it. The use of Commonwealth law where the rules are vague and interpretation is done in the courts is a bad system.
I think you mean "common law" not "commonwealth law", but whatever you want to call it that's not what's happening here. this is statutory law and the questions you pose concern the interpretations of the relevant statutes both by the MSP, as the enforcing entity, and the AG's office. One thing that is worth pointing out though and I don't think we discuss this here. The AG does not prosecute these weapons cases. These cases are prosecuted by the State's Attorney office for the County in which the offense occurred. Those State's Attorneys are not beholden to the AG. They are politicians in their own right. They are independently elected and don't answer to him. So your real concern should be the stance of the SA in your county.
in any event, I am happy to purchase any HBAR if MSP says that they are okay and approves them. I distrust anti-gunners like the next man, but I am not so paranoid as to think they will sign off on my purchase today and then be stupid enough to try to prosecute me for it tomorrow.