Lightweight Aluminum Components Solve Difficult Scope Mounting Problems
Williams HCO and QC Split Rings that feature dual, cam-lock thumbnuts for fast scope removal with no loss of zero.
Big Book Catalog, Issue:70, Page:268
SPECS: Aluminum, black, anodized, bright finish. QC Split Rings - 1" (2.5cm) diameter. Positions scope to the left of the centerline of the bore. QC HCO Rings - 1" diameter. High HCO and High Split rings have longer stud and .200" thick sub-ring base to accommodate large objective scopes. Positions the scope directly over the centerline of the bore.