A Magpul PDR
Chambered in .300 AAC Blackout stoked with their 220 grain subsonic rounds with a small suppressor on the muzzle.
Of course suppressors are NFA and a royal pain in the ass, there is really no easy was to make the PDR not a short-barreled rifle, as even with an 18″ barrel the gun is still too short overall to be non-NFA. And make it too big and you lose the whole point of such a cool gun.
I think it would be cool!
Ooooh, better yet integrally suppress so it’s all one tax stamp.
Ohhh, now that’s starting to look like a decent idea. Sadly the SBR could be had here in Mass, but the Can is a no-go.
Move to Texas and then you could get both and I could play with it, too.