Samson DMR 1 inch Scope Mount Rings w/20 MOA Bias 3 inch Offset Black. Scope mounts are constructed of 6061 T6 aircraft grade aluminum stainless steel locking mechanisms and multi-start threading for rapid quick release action. The only mounts on the market to combine all of the best features in one device. Features: 20 MOA Bias for precision long range shooting One-handed operation Positive locking latch Full length clamp Tool-less adjustability for out-of-spec Picatinny rails Specifications for Samson DMR 1 inch Scope Mount Rings w/20 MOA Bias: Manufacturer: Samson Color: Black Tube Diameter: 1 in Additional Features: 20 MOA Bias Package Contents: Samson DMR 1 inch Scope Mount Rings w/20 MOA Bias Samson 03-00088-01: DMR 1 inch Scope Mount Rings w/20 MOA Bias 3 inch Offset Black