Breakthrough Clean AR15 Upper Brush Set Features The Breakthrough Clean AR15 Upper Brush Set is sized specifically for the AR15 upper receiver starting with a dedicated upper receiver brush and bolt carrier brush that reach carbon deposits standard bore brushes miss. The stiff nylon bristles are aggressive enough to break down baked-on carbon while remaining safe for use on coated and finished metal surfaces. A chamber brush and chamber mop work together to scrub and then lubricate the chamber area and the included Star Chamber pads apply that same targeted cleaning to the star chamber itself. The result is a kit that treats the upper receiver as a system rather than a single bore to be swabbed. An included Star Chamber adapter tool lets the set s accessories be used with a standard cleaning rod so the brushes are not limited to a single handle or tool body. Every brush and mop in the set shares common 8-32 threading meaning any accessory in the kit interchanges freely across the rod and adapter. That consistency simplifies maintenance routines for armorers and range staff who service multiple AR15 uppers since one thread standard covers the whole kit. Backed by Breakthrough Clean Technologies this set gives AR15 owners a complete purpose-built solution for keeping an upper receiver running clean between range trips. Breakthrough Clean AR15 Upper Brush Set Specifications Manufacturer: Breakthrough Clean Technologies Model: AR15 Upper Brush Set Type: Cleaning Tool Set Compatible Hosts: AR-15 Pieces: 10 Thread Pattern: 8-32 Available At: GrabAGun