Magpul Industries MBUS Pro Back-Up Rear Sight， 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"> Made using the highest quality materials </span></li><li><span class="a-list-item"> Tested for durability </span></li><li><span class="a-list-item"> Designed to be safe and unique </span></li><li><span class="a-list-item"> All steel construction </span></li><li><span class="a-list-item"> Case hardened and finished with a ferritic nitro carburizing process for extreme resistance to wear and corrosion </span></li><li><span class="a-list-item"> Mounts on any MIL-STD-1913 Pica tinny/STANAG 4694 rail </span></li><li><span class="a-list-item"> Windage adjustable with low-profile knob - no tools required </span></li><li><span class="a-list-item"> Back-Up Sight Rear </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51Rph05Go6L.jpg" noproxy>