Weaver Standard Top Mount Aluminum Scope Base - Silver - #401S - S&W L K & N Frame

The Weaver Standard Top Mount Aluminum Scope Base in silver (#401S) is a precision optic mounting solution engineered for Smith & Wesson L, K, and N frame revolvers. This base serves as the foundation for reliable long-range sight acquisition on medium-frame wheelguns, enabling shooters to transition from iron sights to magnified optics without permanent firearm modification. Law enforcement and civilian marksmen rely on top-mount bases to maintain the revolver's traditional profile while gaining the accuracy advantages of scoped shooting for hunting, competition, or precision work.

Constructed from aluminum, the Weaver Standard Top Mount delivers a lightweight yet rigid mounting platform that resists the recoil impulse of full-power revolver cartridges without shifting zero. The silver anodized finish provides corrosion resistance and low reflectivity in field conditions. Weaver's machined dovetail slots accept standard Weaver-pattern rings and bases, offering compatibility with thousands of optic configurations. The compact design—measuring 3.3 x 0.6 x 4.55 inches and weighing just 0.1 pounds—adds negligible weight to the revolver's top strap, preserving handling characteristics while enabling precise scope mounting directly above the cylinder.

This base is ideally suited for shooters pairing S&W L, K, and N frame revolvers with low-power variables or fixed-power scopes for hunting medium game or precision target work at extended distances. Installation requires no gunsmithing; the base secures to the revolver's top strap via proven mechanical fit. Once mounted with appropriate Weaver rings and a compatible scope, the platform delivers repeatability across thousands of rounds. Whether upgrading a service revolver for duty accuracy or enhancing a hunting wheelgun, the Weaver Standard Top Mount Aluminum Scope Base provides a time-tested, fieldproven method to bring modern optics to classic revolver platforms.