300 Blackout AR-15 Rifle Build

The guys at Highjak86 review their new 300 Blackout AR-15 rifle build. Components include Magpul furniture, Rock River Arms lower, Palmetto States Armory lower parts kit, BCM upper, BCM charging handle, Samson rail, Rainier Arms barrel, Yankee Hill flash suppressor, Primary Arms red dot, and American Defense mount.

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