FN SCAR | F5-MFG GEN 3 F5-ACR Cyberarm Light Brace System
F5 Mfg Cyberarm Light Brace — Hosted by the F5 Mfg F5-ACR Gen 3 Chassis
Ultra-Lightweight Pistol Stabilizing Brace — 95.75 Grams
The FN SCAR was built bufferless from the ground up, with its recoil system housed entirely in the upper receiver. That makes it a natural host for the F5-ACR Gen 3 Chassis. Bolting directly to the SCAR’s rear stock interface, this configuration keeps the platform’s fire-while-folded capability intact while cutting rearward weight to a minimum.
The Cyberarm Light variant weighs in at 95.75 grams — roughly half the 179.50-gram standard version — shifting balance forward and taking mass off the tail of the gun where you feel it most.
Each chassis is CNC-machined in-house by F5 Mfg from solid 6061 billet. The skeletonized profile is the result of material-optimized modeling: metal is removed only where the load path allows it, so the finished part stays among the most rigid components on the rifle. On 7.62 SCAR builds, that rigidity matters — there’s no flex or rattle under recoil, and zero return is repeatable through the fold cycle.
Topside, the Gen 3 chassis carries a tool-less adjustable cheek riser. Given the SCAR’s high rail line and the tall optic mounts many shooters run on it, that adjustment range solves a real ergonomic problem rather than adding a spec-sheet bullet. The side-folding mechanism locks up positively in both positions.
This is a pistol stabilizing brace — not a rifle stock. It retains the standard Cyberarm brace attachment for arm support in pistol-configured builds while keeping the footprint short and foldable.
Key Features
- Pistol stabilizing brace — not a rifle stock
- 95.75 grams for reduced rearward mass and faster handling
- Direct fit to the FN SCAR rear stock interface — no buffer tube, no adapter block
- Tool-less adjustable cheek riser for optic and head-position alignment
- Side-folding with positive lockup; preserves fire-while-folded
- CNC-machined 6061 billet with load-path skeletonization
- Cyberarm brace attachment for secure, ergonomic stabilization
- Made in the USA
Why It Matters on a SCAR
The SCAR’s factory stock is capable but heavy, and its rear-biased mass is the first thing most owners want to address. The F5-ACR Gen 3 Chassis with the Cyberarm Light Brace removes that weight without giving up folding function or lockup rigidity — a meaningful upgrade for short-barreled and PDW-style SCAR builds where every ounce behind the receiver works against you.
Important Compliance Notice
This product is a pistol stabilizing brace, not a rifle stock. Verify that your firearm configuration complies with all applicable federal, state, and local regulations.
