The Magpul MBUS Pro Sight – Rear is an all-steel folding back-up rear sight for 1913 Picatinny rails. The QPQ nitrided steel resists wear and corrosion. Stowed, it is only 0.38" tall and covers 2.1" of rail.
Windage adjusts without tools. A flip-up/down aperture window offers a large aperture for close range and low light or a small aperture for longer distances. Detents hold the sight, windage knob and aperture window in place when stowed or deployed, so it holds zero. When deployed, it is at standard AR sight height.
Features
All-steel construction, QPQ nitride
Low 0.38" stowed height
Tool-less windage adjustment
Two aperture sizes
Detents hold zero
Standard AR sight height
Specifications
Manufacturer part number: MAG276
Attachment: MIL-STD-1913 Picatinny / STANAG 4694
Height stowed: approx. 1.0 cm (0.38")
Length stowed: 5.3 cm (2.1")
Aperture height over rail: 3.6 cm (1.42")
Apertures: 1.8 mm and 4.8 mm
Adjustment: approx. 0.5 MOA per click (14.5" sight radius), approx. 0.4 MOA per click (20")