The Magpul MBUS Pro Front Flip Sight is a corrosion-resistant all-steel back-up sighting solution that delivers maximum functionality and strength with minimum bulk.  The MBUS Pro is considered by many to be the standard of performance for back-up iron sights.
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 they’re needed. Narrow width front sight is compatible with most IR aiming laser and light installations for the professional user.

Case hardened and finished with QPQ salt bath nitride for extreme resistance to wear and corrosion.
Elevation adjustment knob – no tools required
Steel, rectangular sight post selectable between Match and Standard widths:

0.04” Match width for increased precision
0.06” Standard width for maximum visibility

Technical Specifications

Position: Front
Height above rail, stowed: ~0.43 in. max
Length, stowed: 1.6 in.

COMPATIBILITY
Mounts on any MIL-STD-1913 Picatinny/STANAG 4694 rail including receiver-height gas blocks.

ELEVATION ADJUSTMENT
~1 MOA (1.131”/100 m) per click with a 14.5″ sight radius
~0.7 MOA (0.820”/100 m) per click with a 20″ sight radius