IOR rings are machined steel and should be considered first for any applictaion. I.O.R. Valdada QD Tactical Lever MED 30mm Rings MSRP: $175.00 USA Optics: $155.00 Have a Question? Interested in an item? Give us a call or Send us an E-mail! Phone:1-813-495-7951 E-Mail: UsaOptics@aol.com We're available anytime after 8amEST!!