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The Magpul Industries MBUS (Magpul Back-Up Sight) Generation 2 set is a set of front and rear flip-up backup sights designed for firearms. The set includes the improved MBUS Gen 2 front and rear sights, which feature a low profile design, improved durability, and a slimmer profile compared to the first generation. The sights are adjustable for windage and elevation and are made from durable polymer. The MBUS Gen 2 set is designed to provide a quick and reliable sighting solution in the event of a primary sight failure and can be easily deployed when needed. Both front and rear sights are compatible with most MIL-STD-1913 Picatinny rails.

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.