stickcity910: bolt-carrier-assembly: 5.56 to .300 AAC via armoryblog The circle of life.

stickcity910: bolt-carrier-assembly: 5.56 to .300 AAC via armoryblog The circle of life.

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from: https://www.tumblr.com/blog/view/itspronouncedguy-care/140212705434