Mystery Bolt: Reader Needs Your Help

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.

AR180 bolt

AR180 bolt 2


A 5.56 cartridge fits perfectly.

AR180 556 crop


Please comment with your thoughts on this and lets see if we can’t help him figure out what this bolt fits.

3 Replies to “Mystery Bolt: Reader Needs Your Help”

    1. The owner of the bolt thought the same thing at first but the hole for the cam pin is not in the right place.

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