Magpul Industries USA MBUS Generation II Backup Sights Front &amp; Rear Set<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"> Impact resistant polymer construction provides light weight and resists operational abuse </span></li><li><span class="a-list-item"> Spring-loaded flip up sight easily activated from either side or by pressing the top </span></li><li><span class="a-list-item"> Detent and spring pressure keeps sight erect but allows for unobstructed folding under impact， etc. </span></li><li><span class="a-list-item"> Clamps to any MIL-STD-1913 Picatinny/STANAG 4694 receiver rail and provides the same height-over-bore as standard A2 irons </span></li><li><span class="a-list-item"> NOT FOR RAILED GAS BLOCKS </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41FthadZiXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41W6BBBk1oL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41p4hNvXmmL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41TpyQAMUbL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51AOILApk1L.jpg" noproxy>