Bore Tech Bore Guide for AR-15 300 Blackout

"Bore Tech's AR-15/AR-10 Bore Guides precisely align cleaning rods with the rifle bore and prevent damage to both the firearm and cleaning rod making it a necessary tool for proper cleaning and protection of your firearms. The Bore Tech AR Bore Guides are CNC machined from a rugged, solvent resistant, synthetic polymer that perfectly aligns cleaning rods with the bore and prevents cleaning rods from dragging on the locking lugs and chamber edges. This eliminates scratching of your cleaning rod and wear on your rifle.All AR Bore Guides are custom made specific to the rifle model and caliber to ensure a precise fit. Most guides utilize a solvent proof O-ring to seal in the chamber and prevent cleaners from leaking back into the action. The lengthened bore guide design locates the solvent port safely behind your optics and also holds the upper and lower receiver apart allowing for effortless cleaning. Additional features such as a tapered rear opening for easy jag/brush ali...