The Mark IMS(TM) family easily eliminates the two most common issues faced when mounting standard riflescopes to AR-style rifles; scope height and eye relief. This model is designed to fit your AR's MIL-spec 1913/Picatinny rail and any scope with a 34mm maintube. It also accounts for the extra space needed for modern bolt actions, while adding 20 MOA of elevation. Designed specifically for use with AR's, IMS mounts features a forward cantilever design, placing your scope forward on the rail to provide you will a full field of view. The mount also places the center of the optic 1.5" off the rail, the same height as open sights on a classic AR, making it easier to look th Mfg: Leupold