Wheeler Delta Series Bore Guide AR-15 300 AAC Blackout (7.62x35mm) Aluminum

The Wheeler Enineering Delta Series AR-15 Bore Guide is made of precision CNC machined aluminum with a durable anodized finish. It fits securely in any AR15 upper and can be retained in place by closing the dust cover on the upper which engages a groove in the guide. The bore guide also has chemical resistant O-rings for retention in uppers without dust covers. It works well with standard AR-15 cartridges, extending inside the chamber to prevent solvent from leaking into the action. A solvent po