Replaces the bolt carrier, seals the upper receiver and provides safe and effective cleaning from the breech instead of the muzzle. Solid aluminum rod guide helps prevent throat and chamber damage plus, the rubber "O" rings keep bore cleaning solvents out of the lower receiver. Bore guides will exhibit small points of unanodized material at the rear end. This is where the parts are attached to the dipping fixture when anodizing and is normal on these parts.

SPECS: Machined aluminum, AR-15 - red, anodized finish. 10" (25cm) long. Fits .223 only. AR-10 - blue, anodized finish. 11.5" (29.2cm) long. Fits .308 only.