Pro-Shot BGAR300-BLKOUT Features The Pro-Shot Delrin Bore Guide is fitted specifically to AR platform rifles chambered in .300 Blackout ensuring correct alignment with the chamber during cleaning. Delrin is a tough low-friction polymer that resists wear from repeated rod passes while remaining gentle on the rifle s chamber and bore surfaces. By guiding the cleaning rod straight through the bore the guide helps prevent the rod from contacting and damaging the rifling or crown. This kind of protection matters most for precision-minded shooters who want their barrel s accuracy preserved over years of use. Using a bore guide also helps keep solvents and cleaning fluid from dripping down into the lower receiver and trigger group a common frustration when cleaning AR platform rifles without one. The guide is built to match the known chamber geometry of the .300 Blackout cartridge in an AR pattern rifle so it seats properly every time. Pro-Shot s cleaning accessories are designed with this kind of attention to proper fit between tool and firearm. For AR owners who want a cleaner safer cleaning process on their .300 Blackout rifle the Pro-Shot Delrin Bore Guide is available for sale at GrabAGun. Pro-Shot BGAR300-BLKOUT Specifications Manufacturer: Pro-Shot Model: BGAR300-BLKOUT Material: Delrin Compatible Hosts: AR Platform .300 AAC Blackout Available At: GrabAGun