Weaver Mounts 48090 Top Mount Base 1-Piece Aluminum Black Marlin 39A

The Weaver Mounts 48090 Top Mount Base is a 1-piece scope mount base purpose-built for the classic Marlin 39A lever-action rifle. Precision-machined from lightweight aluminum, this base provides a custom-fit, rigid mounting platform for Weaver-pattern scope rings.

Finished in black, the Top Mount Base attaches directly to the Marlin 39A's receiver using the factory-drilled mounting holes, with mounting screws included for straightforward installation. The single-piece design offers maximum strength to keep rings locked in place under recoil, while the low-profile footprint keeps the optic close to the bore for proper eye relief and a natural sight picture. Rings are not included and must be purchased separately.

Designed for the iconic .22 Long Rifle Marlin 39A, this Weaver top mount base gives shooters a dependable, time-tested foundation for mounting a scope or other optic on one of America's most beloved lever-actions.