Magpul Front Back-Up Sight - Black
MPIMAG245BLK 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 all mil-spec 1913 Picatinny rail equipped weapons but is specifically tailored to the .223 Rem platform. 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. Made in USA. Impact resistant polymer construction provides light weight and resists operational abuse Spring-loaded flip up sight easily activated from either side or by pressing the top Detent and spring pressure keeps sight erect but allows for unobstructed folding under impact etc. Clamps to any standard mil-spec 1913 Picatinny railed hand guard and provides the same height-over-bore as standard A2 irons