Eccentric, steel bushing fits tightly inside .315" upper-receiver, pivot-pin holes reducing the internal diameter to correspond with .250" lowers. Matches the military finish of your gun. Measure your pivot pin before ordering.
AR-15, Issue:09, Page:030
Big Book Catalog, Issue:66, Page:030
Law Enforcement / Police Store, Issue:08, Page:008
New Product Supplement, Issue:565, Page:014
SPECS: Steel, parkerized. .380" (9.6mm) OAL.