The Weaver Classic Top Mount Aluminum Base #88 is a strong, one-piece scope mounting solution designed specifically for Mossberg 500AS and 600 shotguns. Machined from high-strength aluminum and finished in gloss black, this base ensures a precise, custom fit for long-lasting performance. Its rugged construction provides a solid foundation to keep scope rings securely in place, even under heavy recoil. Ideal for pre-1997 Mossberg models, this base is a dependable upgrade for enhancing accuracy and versatility in the field.