<p>Impact resistant polymer construction provides light weight and resists operational abuse <br>Spring-loaded flip up sight easily activated from either side or by pressing the top <br>Detent and spring pressure keeps sight erect but allows for unobstructed folding under impact, etc. <br>Clamps to most any MIL-STD-1913 Picatinny/STANAG 4694 railed hand guard and provides the same height-over-bore as standard A2 irons <br>Protective wings shield the dual, same plane flip apertures & spring-locking A2 front sight post <br>Elevation adjustment tool included, but most aftermarket A2 front sight adjustment tools may be used as well<br>Detent knob easily and positively adjusts windage<br><br> MBUS - Front Gen 2 <br>Weight, w/ hardware: 1.2 oz. <br>Height above rail, stowed: ~0.51 in. <br>Length, stowed: 2.6 in. <br>Length, deployed: 1.5 in.<br><br>NOTE: Cannot be mounted to a railed gas block due to excess heat issues. Front MBUS must be mounted to a railed fore end on the same plane as the receiver rail. Because of this the sight is also not compatible with MOE Hand Guards.<br><br>MBUS - Rear Gen 2<br>Weight, w/ hardware: 1.3 oz.<br>Height above rail, stowed: ~0.51 in.<br>Center of aperture to top of rail: 1.42 in.<br> Length, stowed: 2.6 in.<br>Length, deployed: 1.5 in.</p>