Product DescriptionPro-Shot Chamber Maid 5.56mm/.223 Cal. Chamber Star Swabs make cleaning your AR platform rifle&';s star chamber fast and easy. Designed for AR-15/M4/M16 lug recesses, these strong, absorbent industrial wool felt swabs thread onto a standard 5.56/.223 bore brush (nylon bristle recommended) to evenly apply CLP or oil while removing loosened carbon and fouling. Featuring Pro-Shot&';s patented full AR lug recess pattern (US Patent 0562,935), this convenient 20-pack delivers reliable, thorough chamber maintenance and is proudly made in the USA.Product Highlights Fast, effective cleaning of AR-15/M4/M16 star chamber lug recesses Evenly applies cleaner, lubricant, preservative (CLP) or oil while collecting debris Strong and absorbent industrial wool felt for durability and performance Threads onto standard 5.56mm/.223 bore brush; nylon bristle recommended Patented Chamber Star design; convenient 20-pack for repeated use Specs Compatibility: 5.56mm/.223 caliber AR-15/M4/M16 star chamber Quantity: 20 swabs Material: Industrial wool felt Design: Chamber Star; full AR lug recess pattern; US Patent 0562,935 Country of Manufacture: USA UPC: 709779200825 Manufacturer Part Number: PST556CMS20 Brand Name: Pro-Shot Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.