Breaks loose and removes hard-to-get-at carbon buildup without damaging the bolt carrier. Quickly solves function-related cycling problems caused by excessive carbon deposits inside the bolt recess. Hardened steel scraper tip will last indefinitely with proper use.
AR-15, Issue:11, Page:080
Big Book Catalog, Issue:72, Page:084
SPECS: Steel reamer, plastic handle. 6½" (16cm) long.