F5-ACR Gen 3 Brace with Adjustable Cheek Piece (Select Platform)
The F5-ACR Gen 3 Brace with Adjustable Cheek Piece is the most advanced evolution of the ACR platform to date, engineered specifically as a pistol stabilizing brace for modern bufferless and folding firearm systems. Retaining all the proven features of the original F5-ACR design, the Gen 3 introduces a major performance upgrade: a fully adjustable cheek piece, delivering superior ergonomics, repeatable head positioning, and enhanced control.
Designed and manufactured entirely by F5 Mfg, this brace is precision CNC-machined from solid billet 6061 aluminum. The chassis body has been strategically lightened by removing all unnecessary material, ensuring maximum structural strength without excess weight. The result is a brace assembly engineered to be one of the strongest components on your firearm, capable of enduring hard use while maintaining a refined, balanced feel.
This standard non-skeletonized version offers increased rigidity and durability while maintaining a clean, aggressive profile. The brace features the Cyberarm stabilizing brace attachment, providing reliable arm support and compliance for pistol configurations while preserving a compact, folding-capable footprint when paired with compatible platforms.
Key Features & Benefits
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Pistol stabilizing brace – NOT a rifle stock
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Fully adjustable cheek piece for improved comfort, eye alignment, and shooting consistency
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CNC-machined billet 6061 aluminum construction throughout
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Material-optimized chassis for maximum strength with minimal weight
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Designed to be the strongest part on your firearm
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Cyberarm brace attachment for secure and ergonomic stabilization
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Standard non-skeletonized configuration for enhanced rigidity
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Retains all functionality and compatibility of previous F5-ACR designs
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Proudly Made in the USA
Why the Adjustable Cheek Piece Matters
The addition of a fully adjustable cheek piece represents the most significant improvement over previous F5-ACR generations. It allows users to fine-tune cheek height for optimal optic alignment, improved recoil management, and consistent shooting position—especially critical when running red dots, magnifiers, or LPVO-style optics on compact platforms.
Important Compliance Notice
This product is a pistol stabilizing brace, not a rifle stock. Always ensure your firearm configuration complies with all applicable federal, state, and local regulations.
