Remington 870 short barreled shotgun, made by Capital Armory
https://www.capitolarmory.com/remington-870-sbs-summit-clone.html
SilencerCo Salvo 12 in the 10” configuration. Quiet enough with subsonic rounds to be that length and not wear ear pro for awhile.
AWS Spets 12 with SilencerCo Salvo 12 in full 12” length. An Adaptive Tactical stock to tame the recoil. It needs loads about 1300 fps or faster to cycle. No short shells that fast to try. I suspect just the “2 3/4” shells only. I had a Fostech Bumpski for this while the Form 1 was pending, but turned it in with two other Slide Fires to the ATF before I could get video of the awesomeness that could’ve been.
Mossburg Maverick Over and Under in the thumbnail just to show size perspective.