20MOA of elevation built in for long range shooting A forward offset mount to give proper eye relief specifically for AR platform rifles Heavy duty construction for extreme use 30mm ring diameter Dual steel locking lugs One-piece long clamp bar will not loosen or shift under heavy use or recoil 1/2" steel locking nuts Places the scope 1.50 above the top of the rifle allowing for the use of scopes with up to a 50mm objective Constructed from 6061 aluminum, hard coat anodized for a lifetime of service 100% Made in U.S.A. with a lifetime warranty Technical Specs Works with 30MM scopes with up to a 50mm objective Weight: 8.4oz Overall length: 5.875 in. Width of rings: .85 in. Distance between rings: 2.80 in. Offset from the first ring: 1.40 in. Distance - top of rail to center line of ring: 1.50 in.