Magpul

Significantly reduced in size from the MBUS, it sits at just 0.55 high when folded, 1.38 at its widest point, and weighs a scant 30 grams with hardware. Its aesthetics are derived from the MBUS Pro, but the MBUS 3 Rear Sight is constructed of our impact-resistant polymer, making it lightweight and extremely durable. Featuring the same spring-loaded technology as its predecessor, they can be deployed with an ambidextrous push-button. The MBUS 3 Rear Sight sits at standard AR-height when deployed and includes a windage adjustable, rapid-select aperture system. Ambidextrous push-button deployment and rapid-select rear aperture system. 0.55 high when folded and 1.38 wide at widest point. 0.5 MOA (0.606"/100m) per click with a 14.5" sight radius. 0.4 MOA (0.439"/100m) per click with a 20" sight radius. Made in the USA.