Pro-Shot Chamber Maid Features The Pro-Shot Chamber Maid uses a heavy duty coated flexible chamber rod with #8-32 threads letting shooters attach the included brushes and stars for a thorough cleaning routine. The 5.56mm/.223 caliber chamber brush is sized specifically to reach into the locking lug recesses and chamber area where fouling builds up fastest. A nylon bristle bore brush handles general bore cleaning duties complementing the chamber-specific tools in the kit. This precision-engineered design reflects Pro-Shot s focus on fit and function for AR platform maintenance. Five 5.56/.223 caliber chamber stars are included giving shooters replacement pieces for extended use without needing to purchase them separately right away. These star-shaped cleaning tools are built to conform to the chamber s shape removing carbon and fouling more effectively than a standard brush alone. Keeping the chamber clean helps ensure reliable extraction and feeding which matters most when a rifle needs to run without a malfunction. Made in the USA this tool set gives AR15 M4 and M16 owners a dedicated way to maintain one of the most failure-prone areas of the rifle. Pro-Shot Chamber Maid Specifications Brand: Pro-Shot Model: Chamber Maid Type: Cleaning Tool Set Caliber: 5.56 / .223 Rem Includes: Chamber Rod Chamber Brush Bore Brush 5 Chamber Stars Available At: GrabAGun