The AR-15 Bore Guide is precision CNC machined aluminum with a durable anodized finish. It fits securely in any AR-15 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 .223 and .204, extending inside the chamber to prevent solvent from leaking into the action.A solvent port is conveniently located to the rear of the guide which extends out of the upper making it easily accessible during cleaning. Inner tube diameter .250" (not intended for 6.8mm jag)

Protects chamber and bore from damage
Ensures proper rod alignment for easier cleaning
Reduces solvent leakage into gun's action
Anodized aluminum for durability
Integrated solvent port
Fits AR-15s in .223 and .204
Secures in place with dust cover engagement