Make short work of cleaning heavily fouled AR-15 upper receivers, right down to the locking lug recess. Wool mop quickly loosen stubborn carbon residue from the bolt carrier way and locking lug recess.
AR-15, Issue:11, Page:078
Big Book Catalog, Issue:68, Page:078
Law Enforcement / Police Store, Issue:09, Page:118
New Product Supplement, Issue:554, Page:027