Weaver Classic Top Mount Aluminum Base Silver Marlin 36/336, Mossberg 640 #63BS The Weaver Classic Top Mount Aluminum Base offers a durable and precision-engineered mounting solution for your Mossberg 640 and Marlin 336 rifles. Crafted from machined aluminum, this base provides a lightweight yet robust foundation for your optic attachments, ensuring long-lasting performance. Its custom-fit design includes precision tolerances to seamlessly match your firearm, reducing play and enhancing accuracy. The square-cut notch ensures secure cross bolt engagement, giving you confidence during operation. Compatible with Weaver detachable rings, this base simplifies the process of mounting and removing optics, making it ideal for hunters and shooters who require flexibility and reliability. Designed to resist recoil, it maintains zero even under rigorous firing conditions, contributing to consistent target acquisition and shot placement. The Weaver-style mounting system is widely recognized for its compatibility and ease of use, making this base a practical upgrade for your firearm. Whether you&';re engaging in hunting, target shooting, or tactical applications, the Weaver Classic Top Mount Aluminum Base provides a dependable foundation to enhance your shooting experience. Features: * Machined aluminum construction for durability and lightweight performance * Custom-fit precision tolerances for a seamless fit on Mossberg 640 and Marlin 336 rifles * Square-cut notch for secure cross bolt engagement and stability * Compatible with Weaver detachable rings for flexible optics mounting * Designed to resist recoil and maintain zero during repeated firingtable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 4000 Product Group Code: 4000C Product Sub Group 1: 4000C2 Inactive: No