Mark 4 IMS 20-MOA Integral Rail Insert

Mark 4 IMS 20-MOA Integral Rail Insert

Product Information

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. All Leupold IMS products are tested to endure the rigors of the field and are covered by the Leupold Full Lifetime Guarantee.


  • Mark 1 Rail (IMS Mounts)
  • Mark 2 Rail (IMS Mounts)
  • Mark AR (IMS Mounts)
  • Mark 4 IMS Screws (IMS Mounts)
  • Mark 4 Line (IMS Mounts)
  • Mark 4 Versatility (IMS Mounts)
  • Mark 6 (IMS Mounts)
  • Mark 8 (IMS Mounts)

The Mark 1 Rail slides into place and the living hinge easily clamps to the rifle with two Torx T-15 screws, providing an affordable and easy-to-use alternative to risers that do not push the scope forward.

The Mark 2™ Rail provides the same advantages as the Mark 1, with the added benefit of ½” keeper nuts for quick-release removal and return to accuracy.

The Mark AR mount features a 5 bolt design for a secure hold, 3 lugs on the bottom any kind of recoil, and a STANAG fit which means more contact area with the Picatinny rail for an exact fit.

¼-32 screws hold any of the inserts or optics to the Mark 4 Base with rock-solid dependability, while allowing additional extension for various weapons system and optic combinations.

The Mark 4 line takes versatility to the extreme, providing modular components for interchangeable adaptability.

Use the Mark 4 Base in conjunction with the 20-MOA Integral Rail insert, 1” Integral Ring insert, 30mm Integral Ring insert, or to securely attach the Leupold Mark 4 CQ/T® or HAMR™ directly to the firearm.

These Mark 6 34mm mounts are ideal for mounting Leupold Mark 6 scopes, or any other 34mm maintube riflescope.

These Mark 8 34mm and 35mm IMS Mounting Systems are regulated under ITAR.

Mark 4 IMS 20-MOA Integral Rail Insert Options

  • $79.99

    Matte Finish

    SKU: 110293

    No longer for sale

No Longer Available for Purchase

More Product Info & Specs

Height (in) 0.54
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