bolt-carrier-assembly: Extremely rare Baryshey AVB-762 automatic rifle (prototype)Open bolt delayed blowback 7.62x54r caliber.Roughly 40 of these were made, but they never caught on after shortcomings of the design led to their rejection. There were
tags:
original: https://www.tumblr.com/blog/view/jake-the-fox/126495425761