Flattop-Mounted Bases With Interchangeable Modular Ring/Riser Options - Base, MOA Ringinsert and ring sold seperately
Designed for the precision AR-15 shooter, Leupold’s IMS optic mounts clamp directly to a MIL-STD 1913 Picatinny flattop rail to raise the scope and push it forward, eliminating the need for separate risers or specialized short eye relief optics. Slides into place and secures with steel crossbolts that hold tight. Aluminum, hardcoat anodized finish, matte black.
The versatile Mark 4 Integral Mounting System gives you maximum adaptability with modular components, each sold separately. The Mark 4 Base clamps securely to the rifle’s flattop rail with a pair of hex head crossbolts and accepts the 1" or 30mm scope ring insert. The ring insert unit contains both scope rings, and its position can be adjusted on the base to accommodate different eye relief requirements. The 20 MOA riser can be used instead to provide a 20 MOA picatinny rail mount. When used with picatinny rings, it provided additional elevation for addressing long range targets without maxing out your scope's elevation. (Not compatible with Mark 4 ring inserts.)
AR-15, Issue:11, Page:092
Big Book Catalog, Issue:71, Page:095
Sinclair, Issue:5B, Page:202
SPECS: Aluminum, hardcoat anodized, matte black. Steel crossbolts. 5¾" (14.6cm) long.