Check the listing for details. MDT Premier 25.44mm 0.820" Low Blk Scope Rings 103342-BLK. Condition: New. Listed at 129.95 USD. --> MDT Premier 25.44mm 0.820" Low Blk Scope Rings 103342-BLK SKU: 103342-BLK-MDT MDT Premier 25.44mm 0.820" Low Blk Scope Rings 103342-BLK Upgrade you long range shooting setup with MDTs Premier Scope Rings. These rings are available in numerous heights and the majority of common tube sizes. To ensure ultimate strength and precision, the Premier Scope Rings are CMM checked to 1.5 millionths of an inch, and are precision machined from a solid billet of 6061 aluminum. One of their more notable features is a STANAG 4694 specification, aka NATO Spec. Unlike MIL-STD-1913 rings that leave a small gap between the rail and underside of the mount, the Premier Rings tightly sit on the top of the scope base rail, with pressure being applied to the underside of the angled rail surfaces to maintain a solid interface.Features of the MDT Premier Scope Rings:Machined from solid aluminum billetCMM checked to 1.5 millionths of an inchSTANAG 4694 specification Manufacturer's Part Number 103342-BLK UPC 709951103722Product Type Dimensions: .82 inch Centerline HeightScope Tube Size / Mount: 1 inchWeight: Item Condition