Ar-15 Mbus Pro Magpul Back-Up Rear Sight - Mbus Pro Rear Sight Flip Up Adjustable Steel Black

The MBUS Pro. The all-steel back up sighting solution that delivers maximum functionality and strength with minimum bulk at a price that's even smaller than its size. The dual aperture, windage adjustable rear and no-tool, elevation adjustable front excel in all 1913 Picatinny rail mounting applications, including rail-height gas blocks. Positive detents keep the MBUS PRO front and rear at standard AR sight height when deployed, and so low when they are stowed that you'll never notice them until