AR15 & AR9 Folding Stock Adapter GEN. 4

The Ultimate Compact Upgrade

Sylvan Arms Gen 4 AR9 Folding Stock Adapter

Make your Brigade BM-9 or AR-15 backpack-ready. Turn your premium 9mm PCC or standard rifle into the ultimate concealable tactical setup—without sacrificing a shred of structural integrity.

Maximize Your Mobility

The Gen 4 AR Folding Adapter sits flush against your lower receiver to eliminate gaps, significantly reducing the overall footprint of your firearm for easy stow-and-go travel.

Engineered to fold cleanly to the LEFT (away from the ejection port when pointed downrange), this adapter ensures your build remains snag-free and ready for rapid deployment.

Premium Features

Ultra-Light & Rugged: CNC-machined in the USA from 7075 Billet Aluminum. Highly corrosion-resistant and weighs only 6.0 ounces.
Drop-In Ready: Standard 1-3/16” x 16 thread. Uses your standard AR-15 Bolt Carrier Group with no extra parts required.
Hassle-Free Install: Castle nut wrench included. Installs in minutes without disassembling your existing rifle or pistol.

Compatibility & Fitment

Calibers: Runs flawlessly with .223/5.56, .308, an effortless 300 Blackout setup, and most 9mm PCC platforms.
Included in Box: Adapter hinge, Castle Nut Wrench, and a .625 Aluminum Bolt Extension.

9mm PCC Install Note: Works perfectly with 9mm bolt carriers featuring standard 5/8 ID (.625) sizing. Simply remove the pin and weight from the back of the BCG and insert the included bolt extension.

Exclusions: Does NOT work with Tippmann 22 or LWRC Pistols.

More Information

More Information
Rail Wrap	NA
BM-Accessories	LOWER PARTS KITS

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