AR15A2 Heavy Barrel Front Sight Base & Bayonet Lug Assembly
New fully-machined forged front sight base with bayonet lug, square post front sight, sling swivel and black finish. Originally manufactured for installation on CMMG barrels. For heavy barrels with a .750" OD. Taper pins and gas tube pins are not included.
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This part is found in the following schematics