The Magpul MBUS Pro Steel Flip-Up Front Sight for AR-15 is a rugged, no-nonsense backup iron sight built for shooters who need reliability when it counts. Whether you're running a primary optic and want insurance against failure, or you're setting up a lightweight backup sighting system, this all-steel front sight delivers the strength and functionality that's made Magpul a go-to name in AR accessories. It's designed to coexist peacefully with modern AR setups—including rail-height gas blocks and IR aiming lasers—and stay out of your way until you need it.

Built entirely from steel and hardened with Magpul's Melonite QPQ finish, the MBUS Pro front sight shrugs off corrosion and wear. The narrow profile keeps it compatible with most laser and light mounts, making it a practical choice for professional and tactical users who layer multiple systems on the same rail. Elevation adjustment is tool-free and intuitive; positive detents hold your settings locked whether the sight is deployed or stowed. When folded, it sits just 0.43" above the rail—low enough to stay truly covert until the moment you need iron backup.

Like all Magpul MBUS Pro sights, the front sight maintains standard AR sight height when deployed, ensuring a consistent cheek weld and sight picture across most AR platforms. Picatinny rail mounting is universal, so installation takes minutes on any MIL-STD-1913 or STANAG 4694 rail. Made in the USA, this is the kind of accessory that sits on your rifle doing nothing but looking honest until the day it proves its worth.

Key Features

• All-steel construction with Melonite QPQ case-hardened finish for extreme corrosion and wear resistance
• Tool-free elevation adjustment with positive detents to lock settings
• Mounts on any MIL-STD-1913 Picatinny rail, including receiver-height gas blocks
• Narrow front profile compatible with IR aiming lasers and light mounts
• Stows to just 0.43" above rail; deploys to standard AR sight height
• Positive detents keep sight secure in both deployed and stowed positions
• Made in the USA

Specifications

Weight (with hardware)	1.5 oz
Height above rail when stowed	~0.43" max
Length when stowed	1.6"
Material	Steel with Melonite QPQ finish
Rail compatibility	MIL-STD-1913 Picatinny / STANAG 4694
Elevation adjustment	No tools required

Frequently Asked Questions

Will this front sight work with my AR-15 gas block?

Yes. The MBUS Pro front sight is designed to mount on any MIL-STD-1913 Picatinny rail, including receiver-height and rail-height gas blocks. The narrow profile ensures it won't interfere with most common accessory mounts.

Can I use this sight with an IR laser or light mounted on the rail?

Yes. The narrow width of the front sight is specifically engineered to be compatible with most IR aiming lasers and light installations, making it ideal for professional or tactical setups that layer multiple systems.

What happens when I fold the sight down?

When stowed, the sight sits just 0.43" above the rail and locks in place with positive detents. It's low enough to stay completely out of the way of your optics and accessories until you need it.

How do I adjust elevation?

The elevation adjustment knob requires no tools. Simply turn it to dial in your zero; positive detents hold the adjustment securely in place.