MBUS Sight - Front, RET, Stealth Gray,
MBUS Sight - Front, RET, Stealth Gray,, The MBUS (Magpul(R) 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.