300 BLACKOUT "CAST BULLET" SUCCESS! (FIRST SHOTS)..; )

Powdercoated cast lead 300 blk bullets, and successful AR 300 blackout rifle build combination!!!! Melonite upper, nickel plated trigger components, in a polymer lower receiver. With a Nemo 300 blackout buffer spring....Upper is a Hardened Arms with pistol lenth gas system, oal. 16 inch, with nickel boron BCG. PSA, lower parts build kit with moe, stock and grip. IMR 4227 is the star of the show with the subsonic or heavier bullets

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Please watch: "300 AAC BLACKOUT (bullet chambering) IMPORTANT NEWS............"
https://www.youtube.com/watch?v=-CNKgcQHv-g
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