Leupold s LRW Weaver-Style Mounting Rings are an excellent mounting option for 30mm maintube riflescopes. These rings are made from solid steel for durability precision and repeatability and can be attached to Picatinny/Weaver style rails or bases. Features: - For 30mm Maintube - Compatible with Picatinny/Weaver Rails - Strike-Forged Steel Specifications: - Material: Forged steel - Maintube Diameter: 30 mm - Mount: Picatinny/Weaver style - Height: Medium