Use this off-set bushing and pivot-pin screw to adapt pre-ban and current after-market, upper receivers that accept the .250" dia. pivot pin to Colt Sporter lower receivers that take the larger (.315" dia.) pivot pin. Installation requires no alterations to either unit. Measure your pivot pin before ordering.
AR-15, Issue:10, Page:033
Big Book Catalog, Issue:67, Page:033
Law Enforcement / Police Store, Issue:08, Page:008
SPECS: Steel, blued.