October 9th, 2010

Ivey Externally-Adjusting Scope Mounts for Ultra-Long Range Shooting

Stephen Ivey has engineered a set of gimbaled scope rings allowing up to 150 Minutes of Angle (MOA) of elevation. These rings have precision hinge pins front and rear allowing the entire scope to be tilted by a micrometer-controlled cam in the rear. This allows the scope to tilt upwards (in the rear) with the front ring as the axis while both rings remain parallel to prevent scope binding. The rear ring tilts to match the front while a cam pushes it up. Ivey also makes tilting +150 MOA Picatinny riser rails.

Stephen Ivey Rings

Ivey offers two scope-mounting products. First is the RT-150 Ring set (above). This has two, polished 30mm or 34mm 6061-T6 aluminum rings with bases to fit a Picatinny profile or mil-spec 1913 rail with standard 5mm cross slots at 10mm spacing. (Weaver installation requires extra cross-slots to be cut.) Total elevation is +150 MOA. The micrometer adjuster is graduated in true 1 MOA intervals, with 5 MOA of elevation change per rotation. This product costs $525.00 and requires at least 5-1/2″ length mounting base.

The newest product is the MSRR-150MOA Riser Rail, a pivoting 5.75″-long Picatinny-style rail that accepts Weaver-style clamping scope rings. This Adjusts from Zero to +150 MOA and raises the scope 1.45″ from the top of the action. The extra height provides clearance for large objectives when the unit is tilted for a full +150 MOA elevation. Cross slots are 5mm wide at 10mm (.394″) spacing. The $525.00 riser rail is made of 6061 T6 Aluminum hard-anodized black. Clamps are heat-treated steel. The micrometer thimble is marked for 1 MOA gradations, and provides 20 MOA per revolution.

Stephen Ivey Rings

The Ivey products are expensive, to be sure, but they are beautifully machined, and they offer unique capabilities for ultra-long-range shooters. With the +150 MOA units you have enough elevation to shoot at 2000+ yards! We like the idea of using the micrometer to dial within 1 MOA and then just using the scope turrets for fine-tuning. To learn more, visit the Ivey Shooting website, or call Stephen Ivey at (615) 896-9366, or email him at sales [at] iveyshooting.com .

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