The MBUS (Magpul® Back-Up Sight) is a low-cost, color
injection-molded, 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.
An elevation adjustment tool is included, but most
aftermarket A2 front sight adjustment tools may be used as well.
Made in the USA.