Wheeler Delta AR-15 Bore Guide. Gunsmithing Gear from Wheeler Engineering is made using incredibly durable material that are guaranteed to last for an incredibly long time without needing to be replaced. For a great way to work on your gun choose Wheeler Bore Guide for Delta AR-15. Specifications for Wheeler Fine Gunsmith Equipment Delta AR-15 Bore Guide: Manufacturer: Wheeler Engineering Fabric/Material: Aluminum Caliber: .223 Remington Features of Wheeler Fine Gunsmith Equipment Delta AR-15 Bore Guide Precision CNC machined aluminum Package Contents: Wheeler Fine Gunsmith Equipment Delta AR-15 Bore Guide Wheeler 156213: Delta AR-15 Bore Guide