Magpul MBUS Pro Back-Up Folding Front Sight

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(42 reviews)
Current Stock:
The MBUS Pro (Magpul Back-Up Sight) is a corrosion resistant 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 they're needed. Narrow width Front is compatible with most IR aiming laser and light installations for the professional user.

Made in U.S.A.


  • All steel construction
  • Steel, rectangular sight post selectable between Match and Standard widths
    • —.040” Match width for increased precision
    • —.060” Standard width for maximum visibility
  • Case hardened and finished with Melonite QPQ for extreme resistance to wear and corrosion
  • Mounts on any MIL-STD-1913 Picatinny/STANAG 4694 rail including receiver-height gas blocks
  • Elevation adjustment knob – no tools required
  • Positive detents in both the up and down positions as well as on the elevation knob
  • Standard AR sight height when deployed


  • Weight, w/ hardware: 1.5 oz.
  • Height above rail, stowed: ~0.43" max
  • Length, stowed: 1.6"


  • 5
    Mbus pro

    Posted by Joshua Willison on 29th May 2024

    Great sights !

  • 4
    Always wanted to see what these were about

    Posted by R on 29th May 2024

    Got it quick, a little heavier than the polymer MBUS. Not spring-loaded and hard to deploy, but holds positively in either position and tool-less adjustment of elevation zero. Front sight blade is rectangular, so you can have a wide or narrow post. Casting lines in the back of sight, but all metal construction. Pretty good for what I paid.

  • 5

    Posted by R Riley on 11th Mar 2024

    Great low profile, sturdy and positive click into place. Very happy with purchase.

  • 3
    Magnum pro back up sights

    Posted by Robert Crow on 25th Mar 2023

    Arms Unlimited no longer has the best price on these awesome sights. They have raised the price around 70 bucks for a set of these. I was shopping here just for the great price, but now I can just buy them anywhere. Thanks Arms Unlimited!

  • 4
    Front sight

    Posted by Steve T. on 24th Dec 2022

    Good quality

  • 5
    The gold standard

    Posted by Josh Horne on 12th Sep 2022

    Love these sights, and at this price, you can't beat them.

  • 5
    Mbus sights

    Posted by Davea on 1st Sep 2022

    Great seller. Excellent pricing and quick shipping

  • 5
    Great product as advertised, great experience

    Posted by Bruce S. on 15th Aug 2022

    Don't cheap out, get the Pros instead of the plastic nonsense.

  • 5
    Exactly as described

    Posted by AK on 28th Jun 2022

    Fast shipping