Fits Tikka BRNO/CZ 527 & BRNO Integral Bases
True, QD rings mount directly to the factory integral bases. Levers can be easily repositioned so both rest at the same angle.
Big Book Catalog, Issue:68, Page:279
New Product Supplement, Issue:554, Page:025
SPECS: MIM Steel, powder coated black, matte. Height measured from top of base to inside bottom of ring: Medium - .425" (8.9mm), High - .535 (13.6mm).