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Magpul
Overview
The Magpul 1.5" Flip-Up MBUS Gen 2 Front Sight is a polymer front sight designed for AR-15 platforms, featuring a folding mechanism that allows for quick deployment and unobtrusive storage. At a height of 1.5 inches, this non-illuminated sight provides a reliable aiming solution that maintains a low profile when not in use. Builders often incorporate this sight in mid-length gas system setups chambered in 5.56 NATO, making it a practical choice for those seeking a versatile and durable front sight.
Prices checked
Magpul 1.5" Flip-Up MBUS Gen 2 Front Sight Polymer Black is the most added front sight on GunPartPicker so far in October 2026, ahead of the Magpul .432" Flip-Up MBUS PRO Back-Up Front Sight Steel Black, with about 23% of all front sights added to builds. Up from #2 in September. Builds with this front sight are mostly chambered in 5.56 NATO (75%, then 300 Blackout 9%), split between mid-length (44%) and carbine-length (32%) gas systems, and mostly AR-15 (93%).
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 7 of the 10 retailers we track have it in stock. It dipped to $24.99 at KY Gun Company for a stretch in September 2026, well under its usual $29.99, so sales do come around. Buying today, the lowest price is $24.99 at KY Gun Company, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
We ranked every front sight by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Front Sight Guide →The part most often added in each category by hundreds of builds that include this one
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Magpul 1.5" Flip-Up Mbus Gen 2 Front Sight Polymer Black
| Build | Parts | Total |
|---|---|---|
 | 28 | $3345.26 |
 | 22 | $1733.13 |
 | 25 | $2163.09 |
 | 16 | $1871.72 |
 | 13 | $1149.35 |
 | 24 | $3984.77 |
 | 18 | $1915.80 |
1 global rating
Top reviews
Magpul MBUS 1.5 Gen 2 front sight has clear sight picture once deployed. Zero held through a 500 round day. Polymer is impact resistant - mine has taken hits without breaking. Standard A2 tool for post adjustments. Solid backup sight.
