Gwinn Firearms Bushmaster Arm Pistol Bullpup AR-15 Style AR15 – Texas Gun Blog

I have the generation with the safety inside the trigger guard. Mine fires whatever you put through it! IIRC it was built in 1972. Cool not well known fact….If you take one of the plastic Israeli Orlite magazines, you insert the mag into the well until it locks, then pull the bolt all the way back, and push the mag upwards another 1.5" locking the bolt back. If you then want to chamber a round, all you have to do is tug on the magazine. It will NOT pull all the way out, but will stop and lock in the "normal" position, freeing the bolt, and chambering the round.

The Arm Pistol seems to be mostly based off the Colt IMP-221, an early PDW concept that was devised in 1968.  It was selective fire, fired the less powerful .221 Fireball cartridge, and it had three sets of iron sights (one for each pistol grip position).  Around this time frame, Colt also developed the SCAMP (Small Caliber Machine Pistol), and Peter Tkachev invented the AO-46 (both also early PDW concepts).  Anyways, the Arm Pistol is a pretty interesting firearm that seems to "clone" (if you will) an innovative, but not perfect, design.  This probably isn't as practical as a PLR-16 or a Carbon-15 pistol, but it's definitely something worth collecting.

Yall want the low down on them I have owned 3 and all of them suck. Contrary to popular belief They were issued to troops on a test basis at Edwards air base. My dad was in the service back when parachutes were round and had his ordinance officer give him a full auto one to try during an ejection exercise. Great concept but poorly executed.

This was my favorite gun. I'm so sorry I sold mine.

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I'm so glad I found this video, I saw a show on gangs a wile back and one of the guys actually had one of these and he had no idea what it was(most likely not legal) and I've wanted to know ever since

I've never saw one of these before unique