SYLVAN ARMS AR15 AR9 RH FOLDING STOCK ADAPTER

A Sylvan Arms AR15 AR9 right-hand folding stock adapter transforms your rifle into a compact, packable platform without sacrificing functionality. Whether you're running a 5.56, .308, 9mm, or 300 Blackout build, this Gen 4 adapter folds your stock toward the ejection port (on a standard setup) to dramatically shrink your overall profile—ideal for truck storage, vehicle transport, or tight shooting spaces. Built from 7075 billet aluminum and CNC-machined in the USA, it weighs just 6 ounces, keeping your rifle nimble without adding bulk.

The design sits closer to your AR lower receiver than earlier generations, minimizing gaps and the collapsed length. Installation is straightforward: thread it onto your existing barrel extension using the included castle nut wrench, and you're ready to fold. No disassembly required. The adapter works with most standard 1-3/16 x 16 threaded AR15 bolt carrier groups right out of the box, and it's compatible with JP Enterprise Silent Capture Buffer Springs—a significant advantage if you run that system. The package includes a .625-inch aluminum bolt extension for certain 9mm carriers and all hardware needed to get up and running.

This right-fold orientation (toward the ejection port on standard builds) suits shooters who prefer folding on the gun's dominant side. If you need a left-fold pattern instead, Sylvan offers that option separately. Keep in mind: this adapter does not work with Tippmann 22 or LWRC pistols, and some 9mm bolt carriers may require the included bolt extension after pin removal. For the most compact and practical AR you can stow, the Sylvan Arms folding adapter is a no-fuss upgrade.

Key Features

• Folds right, toward the ejection port on standard setups, for compact carry and storage
• Gen 4 design sits closer to the lower receiver, reducing overall collapsed length
• CNC-machined 7075 aluminum—lightweight (6 oz), durable, and corrosion-resistant
• Works with .223/5.56, .308, 9mm, and 300 Blackout platforms
• Compatible with JP Enterprise Silent Capture Buffer Springs
• Standard 1-3/16 x 16 threads; fits most AR15 bolt carrier groups without modification
• Includes bolt extension and castle nut wrench; no disassembly needed for installation
• Made in the USA

Specifications

Frequently Asked Questions

Will this adapter work with my 9mm AR build?

Yes—the adapter is compatible with most 9mm AR platforms using standard 1-3/16 x 16 threaded bolt carrier groups. Some 9mm carriers with a .625-inch inner diameter may require the included bolt extension (installed after removing the pin and weight from the back of the carrier). If you have questions about your specific BCG, reach out and we can help confirm fitment.

What is included, and is installation difficult?

The package includes the folding adapter, a .625-inch aluminum bolt extension, and a castle nut wrench. Installation requires no disassembly—simply screw it onto your barrel extension using the included wrench and you're done. It's a straightforward add-on that takes minutes.

Does this work with Silent Capture Buffer Springs?

Yes, the Sylvan Arms folding adapter is compatible with JP Enterprise Silent Capture Buffer Springs right out of the box. It does not work with Armaspec Silent Capture systems.

What is the right-fold orientation, and why does it matter?

The right-fold folds your stock toward the ejection port on a standard downrange-oriented build. If you prefer folding on the other side, Sylvan offers a left-fold variant separately. Choose based on how you want the rifle to collapse for your carry, storage, or vehicle setup.