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MBUS PRO® FLIP-UP FRONT SIGHT FOR AR-15 Reviews & Ratings

The MBUS (Magpul® Back-Up Sight) Pro 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 sight is compatible with most IR aiming laser and light installations for the professional user.

FEATURES

All steel construction
Case-hardened and finished with Melonite QPQ™ for extreme resistance to wear and corrosion
.432” height above rail at tallest point and covers less than 1-5/8" of rail when stowed
Standard AR sight height when deployed
Positive detents in both the up and down positions as well as on the elevation knob
Elevation adjustment knob – no tools required
Steel, rectangular sight post selectable between Match and Standard widths:
.04” Match width for increased precision
.06” Standard width for maximum visibility
Made in the USA.

SPECS

Position: Front
Height above rail, stowed: ~0.43 in. max
Length, stowed: 1.6 in.
Weight: 1.5 oz.

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

*NOTE: All MBUS Pro Front Sights now come factory-equipped with the Enhanced Front Sight Post. There is no need to order one separately unless you are retrofitting an older MBUS Pro front sight. Enhanced Front Site Posts are not compatible with standard MBUS polymer sights.

See all of our AR15s and AR15 parts here.

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2 Stars

1 Stars

Reviews Summary

The MBUS PRO® Flip-Up Front Sight for AR-15 receives praise for its sturdy build and compact design, with many users appreciating its steel construction. However, some experience challenges with elevation adjustments and securing the sight in an upright position. While it serves well as a backup, a few users suggest exploring alternatives for primary use due to minor operational issues.

What Reviewers Are Saying

Product Quality

70%

Reviewers frequently commend the sight's sturdy and high-quality construction, noting the advantages of its steel design over aluminum. This aspect contributes to their trust in its durability for serious use.

Adjustment Issues

60%

Several users report difficulties with elevation adjustments, finding that the sight may not respond properly at first. This led to frustration, although many noted that these issues could resolve with more use.

Usability as Backup Sight

50%

Many customers advise that while it is a great backup sight, it may not perform optimally as a standalone iron sight. The low profile is appreciated, but some note that the sight can be challenging to snap up into position.

Installation and Fit

40%

Some reviews mention installation issues, particularly regarding the sight requiring two notches on the rail, which can limit placement options on certain rifles. This has led to concerns about fitting and usability.

Value for Money

30%

Customers generally feel that the sight offers good value relative to its quality, particularly as a backup option. However, some suggest that spending a bit more could lead to a more reliable option.

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Widows son

As good as it gets. Unlike the Mbus 2, which are good, the pros are smaller, very un obtrusive and steel. Designed for serious use.

by Charles Leatherwood on September 17, 2023

Verified Purchase

Was this review helpful? 2

Only two issues

This is a very sturdy optic. Rugged and flat. I do have two issues with it though. The first being that it does take up two notches on your rail. On my particular rifle that prevents it from sitting at the furthest front notch. The second being that When I first went to sight it in the front post was not moving up or down when I turned the adjustment tab. It would rise but then click right back down into place where it just was. I eventually had to take some pliers and hold the post while While I screwed it all the way up and all the way down. kinda upset that I had shot so much ammo and it was the sight having an issue. BUT, I am a Magpul fanatic so I forgave the sight it works perfectly fine now.

Good Back up.

I use this on a Rugger SR556e. This is good as a set for back up sights, but I would not use this for a stand alone iron sight, just a back up. It can be a bit difficult to adjust elevation. Also it is slightly difficult to snap up into position. But all of these cons may go away with some time and more use. Over all its great quality and works well out to 300m on the range.

Great for a BACK UP iron sight

Good sight. I love that it is steel instead of aluminium, because it is on a piston 716. The tool-less adjustment is a bonus. Its use is for a back-up iron sight. It does not 'button lock' in the open position. If you are using a folding front sight as a primary sight, go with a locking sight. Apparently, some people do not read the description, or understand that concept. It does resist going down; as a back-up sight, it is great.

Pretty good sight

I'm rating this sight as only 3 stars because it I had a issue where I could not adjust it up or down. After toying with it I adjusted it up so high that almost came off. So, not it is adjusting up and down like it should be. But 60 rounds later just to figure this all out at home was kinda frustrating.

Very low profile, but could be better

The sight folds very low, but could be made more solid. Pay a little more and get the Troy BUIS