The Weaver 49350 encompasses Weaver Detachable Side Mount Bases, which are optimal for affixing optics to firearms that lack conventional rails. Provided in the package are high-profile brackets equipped with rings and they are attainable in either standard or long lengths. These brackets are built to accommodate various scopes, specifically those having larger objective lenses. It is suggested to refer to the fit charts to ensure you pick the right base for your designated firearm.