Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Instantly Tightens Loose Upper & Lower Receivers

Helps promote better accuracy by making the upper and lower receiver fit tighter. Open upper receiver; drop this long-wearing, rubber wedge into the rear of the lower, behind the push pin. Absolutely no modifications required.

AR-15, Issue:10, Page:033
Big Book Catalog, Issue:67, Page:034
Law Enforcement / Police Store, Issue:09, Page:017
Sinclair, Issue:4B, Page:223
SPECS: High-density, thermo-plastic rubber, ½" (12.5mm) long.