B-Square Colt AR-15/16， M16 Flat Top W-Integral rings， Matte Black Finish<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"> Includes rings </span></li><li><span class="a-list-item"> Fits Weaver style and Picatinny rails </span></li><li><span class="a-list-item"> Fits ar-15 flattop </span></li><li><span class="a-list-item"> Base complete with 1-Inch integral rings </span></li><li><span class="a-list-item"> Attaches to gun's dovetail by large thumb screw knobs </span></li><li><span class="a-list-item"> Return to zero capabilities </span></li><li><span class="a-list-item"> Fits Picatinny and Weaver style rails </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/411ISUvxR6L.jpg" noproxy>