Magpul MBUS Pro Back-Up Folding Front Sight

$85.45 $83.74
(You save $6.21 )
(39 reviews)
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Magpul MBUS Pro Back-Up Folding Front Sight


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"


  • 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

  • 5
    Very good backup sight

    Posted by East TN Gunsmith on 24th Jun 2022

    I really like these sights. Simple. Rugged. Easy to use.

  • 5
    Best All Around Front Sight.

    Posted by Abraham Sakamoto on 10th May 2022

    I have them on 2 of my AR15

  • 5
    I feel like I robbed AU

    Posted by Matt on 8th Apr 2022

    I got these at a steal, almost half off the price of the front and rear sight , both sides are top quality and are good for precision shooting with iron sights, I should know because I qualified expert with iron sites in the Marine Corps