Corrosion-resistant, all-steel back-up sight
Provides maximum functionality & strength
Dual aperture, windage adjustable
Positive detents for standard AR sight height
Fits 1913 Picatinny & most IR aiming installations
The MBUS Pro (Magpul Back-Up Sight) is a corrosion-resistant, all-steel rear back-up sighting solution that delivers maximum functionality and strength with minimum bulk. Case hardened and finished with Melonite QPQ for extreme resistance to wear and corrosion. Positive detents keep the MBUS Pro Rear Sight at standard AR sight height when deployed, and so low when they are stowed that you'll never notice them until they're needed. The dual aperture, windage adjustable rear sight excels in all 1913 Picatinny rail mounting applications, including rail-height gas blocks. The narrow width of this rear sight is compatible with most IR aiming laser and light installations for the professional user. Made in the USA. Weight with hardware: 1.8 oz. Height above rail, stowed, at mid-point: ~0.37". Length, stowed: 2.1". Aperture height over rail: 1.41". Small aperture diameter: 0.07". Large aperture diameter: 0.19".