MPI MBUS GEN2 REAR SIGHT BLK

The MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. The dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons, but is specifically tailored to the .223 platform. Features: 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.