I have a couple mounts, and can't find any info on them. I have never seen anything of this sort, so I can probably say "rare".(I never get to use that word) The blueprints say they are M16/M14 rifle mounts for 2 1/2 ton m44,m44a1,m44a2, 5 ton m39, m39a1, m39a2, and 5 ton m809 series vehicles. The prints have the two dates: 8-27-87, and 7-31-84. It is missing the screws and nuts, but otherwise in good condition. with handling marks. This will probably work on any vehicle with some common sense, and a little work. I have no idea what they are worth, the plans say "U.S. ARMY TANK AUTOMOTIVE COMMAND Warren, MI 48090" There are parts enough for two rifles to be mounted.
The butt goes in the cupped type piece of metal(technical-talk:) the brackets hold the catch assembly. The catch assembly is rubberized, so it wont scratch. The catch rotates 360* to allow the rifle to be removed, and secured.
I can try to post pics of installation plans later. any questions feel free to ask, open to all trades. email@example.com
I'm gonna say $45 plus shipping. Open to trades.http://i120.photobucket.com/albums/o168/snakebyte86/DSCF0121.jpghttp://i120.photobucket.com/albums/o168/snakebyte86/DSCF0122.jpghttp://i120.photobucket.com/albums/o168/snakebyte86/DSCF0123.jpghttp://i120.photobucket.com/albums/o168/snakebyte86/DSCF0124.jpg