M
mr_NaimElmwould buy again
Reviewed on May 4, 2026Verified with Build
fits my mount clean
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Magpul .432" Flip-Up MBUS PRO Back-Up Front Sight Steel Black
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Magpul
Overview
The Magpul .432" Flip-Up MBUS Pro Back-Up Front Sight is designed to provide a durable and reliable sighting option that can be easily deployed when needed. Constructed from steel, this front sight features a low-profile design that minimizes snagging and is specifically engineered for quick, tool-free adjustments. With a height of 0.432 inches, it integrates seamlessly with various optics setups, making it a solid choice for builds featuring a mid-length gas system in 5.56 NATO caliber.
Specifications
MPNMAG275-BLK
StyleFlip-Up
MaterialSteel
Height0.432
ColorBlack
August 2026 on GunPartPicker
Magpul .432" Flip-Up MBUS PRO Back-Up Front Sight Steel Black was the second most added front sight on GunPartPicker in August 2026, behind the Magpul 1.5" Flip-Up MBUS Gen 2 Front Sight Polymer Black, with about 17% of all front sights added to builds. Up from #4 in July. Builds with this front sight are nearly all chambered in 5.56 NATO, mostly on mid-length gas (91%, then carbine-length 9%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today all 6 retailers we track have it in stock. The best price drifted down from $90.20 to $79.99 over August 2026 without a real sale. Buying today, the lowest price is $66.99 at KY Gun Company, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
Not sure which front sight to pick?
We ranked every front sight by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Front Sight Guide →Frequently Built With
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
100%
AR-15100%
CaliberBased on real build data showing which calibers builders choose alongside this product.
100%
5.56 NATO100%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
90.9%
Mid-Length90.9%
Carbine9.1%
Builds Featuring This Part
See all 6 →Builds in the community that include the Magpul .432" Flip-Up Mbus Pro Back-Up Front Sight Steel Black
| Build | Parts | Total |
|---|---|---|
 | 27 | $6457.91 |
 | 21 | $2583.57 |
 | 11 | $5419.37 |
 | 37 | $18478.62 |
 | 28 | $3242.24 |
 | 20 | $3453.89 |
Customer reviews
5.0out of 5
2 global ratings
Top reviews
P
PatchMe556MBUS Pro front no battery
Reviewed on March 11, 2026Verified with Build
Magpul MBUS Pro .432 front sight is steel construction that doesnt need a battery to work. The fixed front concept is faster to deploy than flip ups. Folds completely flat. Sight post adjusts with standard A2 tools. Quality backup sight.
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