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Magpul
Overview
The Magpul MBUS Gen 3 Folding Rear Sight in Flat Dark Earth (FDE) is a durable polymer sight designed to provide a lightweight and robust aiming solution for your AR-15 build. Its folding design allows for easy storage and deployment, ensuring that it remains out of the way when not in use but can be quickly accessed when needed. This sight is particularly popular among builds featuring a mid-length gas system and chambered in .308 Win, making it a versatile choice for a variety of shooting scenarios.
Based on build data

BLEM PSA AR15 Complete Classic Stealth Lower, Black
Lower Receiver
Law Tactical AR Folding Stock Adapter Gen 3 - HK
Stock Adapter
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Magpul AFG-2 Angled Fore Grip - Black
Foregrip
Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green
Charging Handle
Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK
Takedown PinAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| BLEM PSA AR15 Complete Classic Stealth Lower, Black | Lower Receiver | 60 |
| Law Tactical AR Folding Stock Adapter Gen 3 - HK | Stock Adapter | 46 |
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 45 |
| Magpul AFG-2 Angled Fore Grip - Black | Foregrip | 42 |
| Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green | Charging Handle | 39 |
| Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK | Takedown Pin | 38 |
| Platform | Percentage |
|---|---|
| AR-15 | 85.1% |
| AR-10 | 12% |
| AR-9 | 2.9% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 73.3% |
| .223 Wylde | 11.9% |
| 300 Blackout | 4.2% |
| .308 Win | 4.2% |
| .450 Bushmaster | 1.8% |
| 6mm ARC | 1.1% |
| 7.62x39mm | 0.7% |
| 9mm | 0.7% |
| .458 SOCOM | 0.4% |
| 6.5 Grendel | 0.4% |
| .45 ACP | 0.4% |
| .350 Legend | 0.4% |
| 7.62x51 NATO | 0.4% |
| .50 Beowulf | 0.4% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 50.6% |
| Carbine | 27.7% |
| Rifle | 13% |
| Pistol | 8.2% |
| Intermediate | 0.4% |
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