#html-body [data-pb-style=AWJ5Y09]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}The MBUS (Magpul Back-Up Sight) is a low-cost, polymer, color-injected folding back-up sight. The MBUS Front Sight is adjustable for elevation and fits most 1913 Picatinny-railed hand guards, but is specifically tailored to the AR15/M16 platform. Made in the USA. Impact-resistant polymer construction provides light weight and resists operational abuse. Spring-loaded flip-up sight is easily activated from either side or by pressing the top. Detent and spring pressure keep sight erect but allow unobstructed folding under impact, etc. Clamps to most any MIL-STD-1913 Picatinny/STANAG 4694 railed hand guard and provides the same height-over-bore as standard A2 irons. Protective wings shield the spring-locking A2 front sight post Elevation adjustment tool included, but most aftermarket A2 front sight adjustment tools may be used as well MBUS - Front Gen 2 Weight, w/ hardware: 1.2 oz. Height above rail stowed: ~0.51 in. Length stowed: 2.6 in. Length deployed: 1.5 in.