Weaver Mounts 48042 Top Mount Base #42 Black Aluminum 1-Piece Scope Base - Mossberg 400/Remington 10/11/12

The Weaver Top Mount Base #42 (MPN 48042) is a one-piece aluminum scope base machined to tight tolerances for a precise, custom-fit installation directly on the receiver of compatible firearms. Finished in a durable black coating, this rigid mount gives your rings a rock-solid platform and helps your optic hold zero shot after shot.

This Top Mount Base is engineered to fit the Mossberg 400 as a front base and a range of older Remington long guns, including the 10, 11, and 12. Additional Remington fits extend to models such as the 34, 341, 510, 511, 512, and 521T. The base installs directly to the receiver using the included mounting screws and accepts any standard Weaver-style scope rings (sold separately), giving you a solid foundation to mount the optic of your choice.

Built in the classic Weaver cross-lock style for maximum grip under recoil, each piece is machined to deliver the strength and repeatability expected from one of the best-known names in scope mounting. Whether you are restoring a vintage shotgun or upgrading a classic rimfire, the #42 Top Mount Base is a reliable, no-nonsense platform for your optic.