Magpul MAG276BLK MBUS Pro Sight Rear Black Folding for AR15

The MBUS Pro Magpul BackUp Sight is a corrosionresistant allsteel backup sighting solution that delivers maximum functionality and strength with minimum bulk at a price thats even smaller than its size. Casehardened and finished with Melonite QPQ for extreme resistance to wear and corrosion. The MBUS Pro rear sight is windage adjustable with low profile know no tools required. Positive detents keep the MBUS Pro Front and Rear at standard AR sight height when deployed and so low when they are stowed that youll never notice them until theyre needed. Small aperture diameter 0.07 inches. Large aperture diameter 0.19 inches. 0.5 MOA 0.566100m per click with a 14.5 sight radius. 0.4 MOA 0.410100m per click with a 20 sight radius. Made in the USA.