Magpul MBUS Gen 3 Folding Front Sight, Black - MAG1166-Black
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Magpul
Overview
The Magpul MBUS Gen 3 Folding Front Sight is a versatile and durable sighting solution designed for quick deployment and reliable performance. Made from polymer, this folding front sight offers a lightweight option that conveniently stows away when not in use, ensuring it won't snag on gear during transport. It is commonly found in builds featuring a carbine gas system and chambered in 5.56 NATO, making it a popular choice for those seeking an efficient sighting system for tactical or competitive applications.
Specifications
August 2026 on GunPartPicker
Magpul MBUS Gen 3 Folding Front Sight, Black - MAG1166-Black was the fourth most added iron sight on GunPartPicker in August 2026, behind the Magpul MBUS Gen 3 Folding Rear Sight, Black - MAG1167-Black, with about 8% of all iron sights added to builds. That's its 4th straight month at #4. Builds with this iron sight are mostly chambered in 5.56 NATO (67%, then .45 ACP 33%), split between mid-length (50%) and carbine-length (50%) gas systems, and split between AR-15 (50%) and AR-10 (25%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 9 of the 10 retailers we track have it in stock. The best price drifted down from $32.99 to $24.99 over August 2026 without a real sale. Buying today, the lowest price is $24.99 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
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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.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 3 →Builds in the community that include the Magpul MBUS Gen 3 Folding Front Sight, Black - MAG1166-BLK
| Build | Parts | Total |
|---|---|---|
 | 30 | $6230.88 |
 | 16 | $4553.31 |
 | 26 | $1748.17 |
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