Weaver Mounts 99503 Extended Multi-Slot Base Remington 700 SA 6-48 Matte Aluminum

The Weaver 99503 Extended Multi-Slot Base is a one-piece tactical scope rail purpose-built for the Remington 700 Short Action. Precision-machined from rugged 6061-T6 aircraft-grade aluminum and finished with a matte black Type III hard coat anodizing, this extended base adds roughly 1 inch of forward rail length beyond a standard mount, giving shooters more room to position long-range optics, night vision devices, or accessories out in front of the ejection port.

The multi-slot design accepts both Weaver and Picatinny style rings, making it a versatile mounting platform for a wide range of tactical scopes, hunting optics, and red dots. Secured with 6-48 screws, the one-piece base bolts directly to the factory drilled and tapped Remington 700 SA receiver for a clean, low-profile fit with consistent return-to-zero performance. The added rail length also improves eye-relief options on magnified optics and provides extra space for accessories such as backup iron sights or a reflex sight mounted in line with a primary scope.

Measuring 0.95 x 3.75 x 10.30 inches (height x width x length), this Weaver tactical base is a straightforward, lightweight upgrade for any Remington 700 short-action rifle that needs a more flexible optic mounting solution.