Scalarworks Ar-15 Peak 01 Fixed Iron Rear Sight Black

The Scalarworks AR-15 Peak 01 fixed iron rear sight is purpose-built for modern carbines running a 15-inch sight radius, not the outdated 20-inch geometry of rifle-era A2 sights. This is a no-compromise backup or primary sighting solution for shooters who trust iron sights on their AR platform—whether you're running a red dot, magnified optic, or going old-school. The rear sight features two flip apertures (1.78mm and 5.08mm) and manually adjustable windage in half-MOA increments so you can dial in exactly where you need to be.

Scalarworks engineered the Peak with a flat-faced rear peep to eliminate the distortion and glare that plagued concave designs, giving you a cleaner sight picture and faster target acquisition. The 36mm height above the rail sits it perfectly as a backup sight under popular optics like an Aimpoint mounted on a Scalarworks Leap Mount, or it works standalone for shooters who prefer irons. Every component is built tough: 7075 T6 aluminum body (significantly stronger than standard 6061), paired with 4140H steel hardware finished in black nitride.

If you're tired of A2 relics and want fixed iron sights actually designed for a carbine, the Peak 01 delivers the ruggedness and precision you'd expect from Scalarworks. Mount it and run it—no batteries, no excuses.

Key Features

• Optimized 15-inch sight radius geometry for AR-15 carbines
• Flat-faced rear peep eliminates highlight bias and glare distortion
• Dual flip apertures: 1.78mm (.07") and 5.08mm (.20")
• Windage adjustable in 1/2 MOA clicks
• 36mm height positions it as ideal backup for optic-mounted setups
• 7075 T6 aluminum construction—stronger than standard aluminum alloys
• Black Mil-A-8625 Type III hardcoat anodized finish
• 4140H steel hardware with black nitride finish

Specifications

Frequently Asked Questions

Will this work as a backup sight under my red dot?

Yes. The 36mm height positions the Peak 01 rear sight to coexist under optics mounted on standard picatinny rails, making it an excellent backup for Aimpoint and similar optics—especially when paired with a Scalarworks Leap Mount for the front sight.

What's the difference between the two rear apertures?

The Peak 01 includes two flip apertures: a smaller 1.78mm (.07") opening for precision aiming and distance shooting, and a larger 5.08mm (.20") for rapid target acquisition in close quarters. Flip between them depending on your use case.

Is this compatible with my AR-15?

The Peak 01 is a rear sight designed for standard AR-15 picatinny rails and is optimized for the 15-inch sight radius typical of modern carbines. It is not compatible with M16A2 or other rifles with 20-inch sight radius geometry.

Can I adjust elevation on the rear sight?

No. Elevation is adjusted at the front sight. The Peak 01 rear sight features windage adjustment only via 1/2 MOA clicks.