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AAC HUB2K 5.56/6mm ARC 1.5" Dia Black 1.375x24\n\n- The HUB2K is a spin on the legendary M4-2000\n- DMLS 718 Inconel 3D printing\n- 1.375-24 HUB threads, Full Auto Rated\n- 12.7 oz\n- 34 dB reduction
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