Machined to tight tolerances for a custom fit Offer the rock solid Weaver cross-lock design to fit a variety of rings (See Mount Application Chart for firearm/base matching) https://www.weaveroptics.com/on/demandware.static/-/Library-Sites-HuntShootAccessoriesSharedLibrary/default/dw7047bf4e/productPdfFiles/weaverPdf/2016_WeaverMountsChart.pdf
