I'm torn on what I want to do. I'm in the middle of building a AR pistol. Have both the brace and standard spring tube. If I'm gonna go sbr, then it's getting a standard stock. Otherside of me says the govt doesn't need to know what I have and to keep it a pistol.
As far as I can tell, the only thing you need to think about now is making sure receiver(s) is(are) in your Gun Trust, if you have one, before this publishes. Further, if you intend to use the special braced pistol to SBA Form 1, you'll want to make sure the pistol was either registered with the MSP or that you're exempt. This could be due to Opinion 7403 or otherwise.
https://www.ag.state.mi.us/opinion/datafiles/2010s/op10383.htmThere are hassles with an SBR that you avoid with a pistol. One of them, the engraving requirement, is being waived. How this makes any sense, who knows.