Truglo Riser Mount 1/2-Inch Picatinny-Style， Black<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"> Raises mounting surface by 1/2". Mounts to existing Picatinny-style rail. </span></li><li><span class="a-list-item"> CNC-machined aluminum. Great for any AR-15 Flattop. </span></li><li><span class="a-list-item"> Easy to install without modification. Length is approximately 4". </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41D5ieD6kQL.jpg" noproxy>