Multi-Slotted For Perfect Ring Spacing
For Series 181 and newer with removable bolt stop covers. Attaches to side of receiver; replaces the bolt stop cover plate. Locks in place with two brass-tipped setscrews. Comes with 1" Weaver-style scope rings; Black model also available without rings.
Big Book Catalog, Issue:66, Page:253
SPECS: Aluminum, anodized black or silver. Screws and recoil keys are steel.