GDI R-COM E-Model Combat Optic Quick Detach (QD) Scope Mount - fits all Trijicon ACOG and Reflex，Burris 3x / 5x， Primary Arms 3x / 4x /5x sights<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> For use with Trijicon® ACOG &amp; Reflex Series Optical Sights </span></li><li><span class="a-list-item"> Eye-Relief Enhancement: 3.5” – Adjustable in 3/8” increments </span></li><li><span class="a-list-item"> Retains Zero under extensive live fire usage and while subjected to harsh mechanical stresses: .01 MOA </span></li><li><span class="a-list-item"> Returns to Zero following repeated removal-remount cycles during extensive live fire usage: </span></li><li><span class="a-list-item"> Value: .01 MOA [Lab Tested] &lt; .20 MOA [Live Fire] </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41fzXoHhsvL.jpg" noproxy>