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Magpul build buddy: Magpul MAG536BLK – BEV Block Black Polymer w/ Steel Support Shank for AR-15/M4 Upper&Lower Receivers featuring UPC 873750000145. Barrel extension vise savior, armorers ally. MAG536BLK – Magpul's receiver rock.
Precision-engineered vise block for securing AR15/M4 upper and lower receivers during armorer work, fits barrel extension perfectly to prevent damage, reinforced polymer with steel shank for durability, slim profile for easy insertion, and essential for headspacing or barrel changes.
Essential AR build tool: Magpul MAG536BLK BEV Block black polymer steel reinforced.
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