Up for sale is this really odd, unique, rare, and honestly awful Bushmaster ARM pistol. These were initially developed by Gwinn Firearms (which morphed into Bushmaster). They were designed to be used by Air Force pilots who needed something with more power than a pistol, but still be able to fire one handed. I don't think it was ever adopted due to being pretty awful. The sites are comical, 2 pieces of sheet metal sticking up that can rotate as the receiver rotates. I added pictures to the album of the receiver rotated to each side while holding it one handed. It was made to rotate so the brass wouldn't eject straight up into your face and also allows you to grip your support hand onto the magazine for added stability.
Collectors of odd 80's guns love these things. Reportedly only about 2,000 of them were made commercially before Bushmaster quit production and started focusing on AR15 development that they are (or were, RIP) well known for today. If you like military history or Bushmaster history, this is for you.
These have ranged from $2-3k throughout the past several years. Due to the market being shit, I'm pricing it on the low end: $2k shipped and it's yours. Feel free to ask any questions.
https://imgur.com/a/1FVvcpJ