Highly Polished Mirror Chrome BCG — Full Auto Bolt Carrier Group | 5.56 / .223 / 300 BLK Ruger Break-in period: Dry fire 10-20

Break-in period: Dry fire 10-20 cycles before live fire

45° vs 90° Throw 45° Fast Throw — Competition Half the travel distance of standard

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Highly Polished Mirror Chrome BCG — Full Auto Bolt Carrier Group | 5.56 / .223 / 300 BLK Ruger Break-in period: Dry fire 10-20Most BCGs are built to disappear inside the receiver. This one wasn't. A true mil spec bolt carrier group finished in highly polished mirror chrome the kind of finish that turns a glass top build into a centerpiece and makes an ejection port worth looking into. But the finish is the last thing that matters here, not the first. Underneath the mirror is a full auto profile carrier machined from 8620 tool steel, a C158 bolt, a properly staked 4130 gas