Ruger 30mm Medium Scope Ring 4B30HM – Fits 30mm Tube, Matte Blued (90321)

• Scope ring designed for mounting optics with 30 millimeter tube diameter
• Medium height configuration supports scopes with 42 millimeter objective lenses
• Matte blued finish reduces glare and provides corrosion resistance
• Designed as genuine Ruger factory accessory for proper firearm fitment
• Constructed for secure scope mounting and consistent alignment performance
• Sold individually for flexible mounting configurations

The Ruger Standard 30mm Medium Ring 4B30HM is a scope ring designed for mounting 30mm rifle scopes onto compatible firearm receivers.

This Ruger Standard 30mm Medium scope ring features a matte blued finish and accommodates objective lens diameters up to 42mm. The 30mm ring diameter fits standard scope tubes and provides a medium height profile suitable for balanced mounting configurations. This product is used for securing optics in stable alignment during range use or general shooting applications. Manufactured as a genuine Ruger factory accessory, the ring is sold individually and classified under the 4B30HM series. In typical setups, the medium height offers a lower mounting position compared to high or extra high rings while maintaining sufficient clearance for moderate objective sizes. The Ruger scope ring is categorized under mounting rings and provides a fixed interface with a black matte finish for consistent integration with compatible Ruger platforms.