A reader sent me some pictures this weekend and we were unable to identify the maker of this bolt. It has many similar attributes to the AR-180 bolt but the dimensions are not the same.
The overall length is 2.75″ and the “tail” is 1.0″ long.
The bearing surfaces look to be in the same place as on the AR-180 bolt, but the tail is too long.
A 5.56 cartridge fits perfectly.
Please comment with your thoughts on this and lets see if we can’t help him figure out what this bolt fits.