The Magpul MBUS 3 Sight – Rear is a lightweight, compact polymer back-up rear sight for 1913 Picatinny rails. It stows at just 0.55" tall and 1.38" wide, staying out of the way until your primary optic fails.
The spring-loaded sight deploys with an ambidextrous button. Windage is adjusted without tools. A rapid-select rotating aperture offers a wide view for close range or low light and a narrow aperture for longer distances. Standard AR sight height ensures compatibility with standard front sights such as the MBUS 3 front sight.
Features
Low and narrow when stowed
Spring-loaded ambidextrous deployment button
Tool-less windage adjustment
Two aperture options
Standard AR sight height
Lightweight polymer, 30 g
Specifications
Manufacturer part number: MAG1167
Attachment: MIL-STD-1913 Picatinny
Height stowed: approx. 1.4 cm (0.55")
Width: 3.5 cm (1.38")
Center of aperture to top of rail: 3.6 cm (1.42")
Adjustment: approx. 0.5 MOA per click (14.5" sight radius), approx. 0.4 MOA per click (20")