Leupold 170489 Standard Base – Ruger American RF Matte

The Leupold Standard two-piece scope base (model 170489) provides a steel, receiver-mounted platform for attaching optics to Ruger American Rimfire rifles. It is finished in matte black to reduce glare and present a low-profile appearance. The design accepts Leupold STD ring systems and preserves internal scope adjustments by using windage screws in the rear ring for lateral alignment during sight-in.

Key Specifications

• The manufacturer is Leupold.
• The model is the Standard Base (170489).
• Compatibility is listed as Ruger American Rimfire (RF).
• Material is Steel.
• Finish is Matte Black.
• Mount type is To Receiver.
• Rings are not included.
• Pieces included: 2.
• Intended gun type: Rifle.

Designed for practical, repeatable optic alignment, this two-piece STD base offers a durable mounting solution for Ruger American Rimfire platforms. Its simple, proven design streamlines bore-sighting and sight-in while minimizing interference with scope internal adjustments.