Make short work of cleaning heavily fouled AR-15 upper receivers, right down to the locking lug recess. Specially sized and shaped bronze receiver brush quickly looses 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