80% Project X AR15 CNC Lower Receiver FDE

Our team has been modifying and improving their own personal Broken Arms lowers since 2011. Each revision bringing more comfort, reliability and style to your builds. No gimmicks, no toys.

Project X is our tenth revision, and brings the best we have to offer through years of real-world experience and your feedback.

Project X looks great with Magpul® PMAG magazines.

Project X will work with these calibers:

Rimfire calibers

• .17 Mach 2
• .17 HMR^[1]
• .17 Winchester Super Magnum^[1]
• .22 Long Rifle^[2]
• .22 Winchester Magnum Rimfire^[1]

Centerfire calibers inch measurement

• .17 Mach IV
• .17 Remington Fireball
• .17 Remington
• .17-223
• .20 Practical
• .204 Ruger
• .222 Remington
• .223 Remington
• .22 PPC
• .22 Nosler
• .224 Valkyrie
• .224 Kritzeck (Shortened .223 Remington neck)
• .223 Winchester Super Short Magnum
• .243 LBC
• .243 Winchester Super Short Magnum
• .25 Winchester Super Short Magnum
• .25-45 Sharps
• .277 Wolverine (6.8×39mm)
• .30 Carbine
• .30 Remington AR
• 30 American
• 300 OSSM
• 300 AAC Blackout (7.62×35mm)
• .300 Whisper
• .350 Legend
• 358 Yeti – Wildcat
• 375 SOCOM
• .40 S&W
• .45 ACP
• .450 Bushmaster
• .458 SOCOM
• .50 Action Express
• .50 Beowulf

Centerfire calibers metric measurement

• 5.45×39mm
• 5.56×45mm NATO
• FN 5.7×28mm
• 6×45mm
• 6.5mm Grendel
• 6.8×39mm (.277 Wolverine)
• 6.8mm Remington SPC
• 7.62×37mm Musang
• 7.62×39mm
• 7.62×40mm Wilson Tactical
• 7.92x33mm Kurz
• 9mm Parabellum
• 10mm Auto
• 9x39mm

Lower Receiver — Ideal for Custom Builds

Elevate your build with our 80% AR15 CNC Lower Receiver

Unlock the full potential of your AR-15 build with our 80% AR-15 CNC Lower Receiver. Whether you are an experienced gunsmith or a casual hobbyist, ours is designed for you. Made with precision and top tier quality. They are crafted from 6061-T6 Aluminum, creating a perfect foundation for your project.

How we can help perfect your project

Upgrade your AR-15 with our 80% AR-15 CNC Lower Receiver. It is made with advanced CNC machining and high-quality 6061-T6 Aluminum. The precision engineering not only boosts durability but also ensures reliable performance. As a result, it offers a sturdy and dependable addition to your build. Meaning, you can trust this product to enhance both performance and longevity.

You can come one step closer to completing your project with our AR15 Lower Receiver Jig. Our jig and tool kit simplifies the process to achieve accurate results. You’ll be able to move forward with your build more efficiently. If your want to give your build a very customized feel, we offer a range of designs or color options listed below:

Raw, Flat Dark Earth, Project X Black, Black.

All 80% AR15 lower receivers have simple designs that make customization easy. Additionally, these designs ensure that modifications and upgrades are straight forward, offering more flexibility and convenience for your build. As a result, you can easily create a personalized setup.

Whether you want to add custom engravings, install unique components, or adjust ergonomics, this receiver provides a great base to either leave as is or customize with your personal touches.

Order yours today!

Perfect your build with our 80% AR15 CNC Lower Receiver and experience the difference that quality precision engineering makes in your firearm build. Additionally, this superior craftsmanship enhances performance and durability. So now you can enjoy improved functionality and reliability. As a result, your firearm will look exceptional and perform at its best.

For any questions or concerns please contact us.