If I needed a 7.62x39 bolt Id consider Black Rifle Arms bolt. I read where BRA sell Millenium bolts in 6.5 Grendel but unsure who manufactures the x39 bolts. The 7.62x39 bolts sold by Aim Surplus get good reviews on AR-15.com. I dont own a 7.62x39 or use an x39 .125 bolt face depth bolts just what Ive read on the forums.
https://www.blackriflearms.com/AR-15-762...p_239.html
https://www.blackriflearms.com/AR-15-762...p_239.html

