I got into a convo with a guy at a party last night that has a .300 blackout pistol he made from an 80% lower. Overall length is well under 26". Anyway, he was carrying it concealed in a case in his car with a magazine inserted and a round in the chamber. When he showed it to me I asked how he registered it to be able to carry it under his CPL and he said he didn't have to due to the 80% lower. I told him I was pretty sure that if he was going to claim it as a concealed pistol it had to have serial numbers and be registered as such, and he disagreed. I admit I don't know 100%.......but I believe he's going to get loved tenderly if he ever gets stopped with it.

What are the laws in Michigan for building a pistol from an 80% lower and then carrying it concealed?? What do you have to do to legally be able to do this?

He is in violation of the law..................period. If it's under 26" and has a stock it's a SBR which requires a federal tax stamp prior to assembly. Ten years in the federal pen and $10,000. Under Michigan law he has an unregistered pistol and that's only if it doesn't have a stock. Again SBR laws will kick in if it does.

Your friend is mistaken and wishful thinking does not the law make.

He is required to inform every Law Enforcement Officer that he is carrying concealed should he get pulled over. Failure to do so is a violation. 80% lowers, once completed into a firearm are firearms and all the laws regarding them remain on the books. That includes the obligation to register all handguns under Michigan Law.

I didn't read anywhere in his post about this thing having a stock . . . so lets not make up our own facts here.  We're talking about a pistol. NOT an SBR.

I do agree that while 80% builds are completely fine at a Federal level, he is in violation of State law because MI requires pistol registration.  All he needs to do is add some sort of identifying marks to the lower, and send in an RI-060.  Now it is a registered pistol.

He may end up fighting with his local sheriff because they won't recognize the "manufacturer" or the "model". I would recommend stopping in and having a conversation about what ID marks will go through the system without a hiccup.

Yes, definitely not an SBR. He's under 26" and built it out as a pistol. It has a pistol buffer on it without a stock.....just the buffer.

I agree with your premise that it has to be registered, which is why I was trying to get him to look into it a little more. I don't want him to get in legal trouble if he gets stopped with it, but I also don't know 100% what the laws are regarding 80% lower builds into pistols. My reasoning in saying it's a no go is that he is required to carry a lawfully registered pistol as part of his CPL......and the 80% lower build has never been registered.

Like others have said, 80% lowers built into a pistol configuration (no buttstock) still require registration as a pistol, whether concealed or not.