--- title: "Weaver #421M 1\" Medium Top Mount Base" description: "Weaver #421M top mount base with a medium height, 1\" tube fit, 40mm objective compatibility, and black matte-anodized 7075-T6 aluminum construction." canonical_url: "https://www.kygunco.com/product/weaver-top-mount-base-421m-1-medium" meta: author: KYGUNCO "og:description": "Weaver #421M top mount base with a medium height, 1\" tube fit, 40mm objective compatibility, and black matte-anodized 7075-T6 aluminum construction." "og:image": "https://cdn.kygunco.com/assets/products/305754/thumbnail.jpg?v=1775068895" "og:image:height": "500" "og:image:width": "500" "og:title": "Weaver #421M 1\" Medium Top Mount Base" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Brands](https://www.kygunco.com/brands) / [Weaver](https://www.kygunco.com/brand/weaver) / WVR-48381 ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/305754/main.jpg?v=1775068895) For illustration purposes only, this image may not be an exact representation of the product. # WEAVER Top Mount Base #421M 1" Medium The Weaver #421M top mount base is a medium-height mounting solution for 1" optic tubes with 40mm objective compatibility. It is made from lightweight 7075-T6 aluminum and features a durable black matte-anodized finish. $82.92 ** 5 interest-free payments of **$16.58** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Flat Rate $13.94 for every 25 lbs. Shipping to HI & AK may incur additional fees. ** Ships To Your Home Fulfilled by a partner warehouse. ** Partner Fulfilled Selling fast. Limited quantities available. Item # 305754 Style WVR-48381 UPC 604544696332 Condition New Manufacturer [Weaver](https://www.kygunco.com/brand/weaver) Weight 2 lb Weaver Precision and Precision Tactical Rings are engineered for shooters who demand uncompromising stability and repeatability from their optic mounts. Built from high-strength 7075-T6 aluminum, these rings provide a lightweight yet exceptionally rugged platform designed to perform in hunting, competitive, and tactical environments. Both ring families maintain tight tolerances for consistent alignment and a secure hold, while the Precision Tactical models add robust cross-bolt reinforcement and expanded size options for mission-specific setups. The result is a low-profile, highly dependable mounting solution you can trust in any condition. SPECIFICATIONS - Tube diameter: 1 in - Objective lens compatibility: 40 mm - Ring height: Medium - Material: Aluminum (7075-T6) - Color: Black - Finish: Matte anodized ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## More from Weaver ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/weaver-top-mount-base-421m-1-medium#webpage","@type":"WebPage","description":"Weaver #421M top mount base with a medium height, 1\" tube fit, 40mm objective compatibility, and black matte-anodized 7075-T6 aluminum construction.","name":"Weaver #421M 1\" Medium Top Mount 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