The Geissele Trigger Fitting Pin is correctly sized to help with all small pin AR-15/AR-308 hammer and trigger installations.
AR-15, Issue:11, Page:088
Big Book Catalog, Issue:68, Page:089
Big Book Catalog, Issue:69, Page:086
Big Book Catalog, Issue:70, Page:087
Big Book Catalog, Issue:71, Page:090
Big Book Catalog, Issue:72, Page:092
Big Book Catalog, Issue:73, Page:033
Big Book Catalog, Issue:73, Page:099