Leupold Mark 4 IMS Integral Rail Insert
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The Leupold Integral Mounting Systems (IMS) family quickly and easily eliminates the two most common issues faced when mounting standard riflescopes to AR-style rifles; scope height and eye relief. From the Mark 1™ to the Mark 4®, each aluminum IMS cantilever design mounts directly to the firearm’s Mil-Spec 1913/Picatinny to raise the scope and push it forward, eliminating the need for risers or specialized optics with shortened eye relief.