Ar-15 Bore Guide - 12.7x42mm Bore Guide
Clean your AR-15 from the breech to prevent muzzle or chamber damage. Insert into the upper receiver replacing the bolt carrier for safe and easy cleaning. Self-centers in the receiver. O-ring seal at breech and solvent port keeps chemicals out of the action. Mfg: Satern SPECS: Machined Delrin®. 9½" (24cm) long. Models for AR-15s chambered in .223/5.56mm NATO or 6.5mm Grendel.