Sylvan Arms

Where Premium Quality and Affordability Meet


AR15 & AR9 Folding Stock Adapter Gen. 4

(1 customer review)


The Sylvan Arms Folding Stock Adapter allows you to fold your stock and significantly reduce the length of your rifle for easy stow and travel.


We have made the new Gen 4 to sit closer to your lower to reduce length. We have also designed a centering pin that replaces the tube lock.

We have reduced the overall size to give your weapon a more compact look.

Specifically designed for gas piston and direct impingement systems .223 / 5.56 to .308 systems, it has standard 1-3/16” x 16 thread and does not require any additional parts to be used with standard Bolt Carrier Groups.

It is CNC-machined in the USA from 7075 Billet Aluminum, making it uniquely lightweight and corrosion resistant. This assembly weighs only 6.0 ounces. Comes with the custom made wrench that fits our custom castle nut. The product does not need to be disassembled in order to install it on to your rifle/pistol.

Simply screw on, fold and carry!

Compatible with Silent Capture Buffer Springs.

Product Details

  • Includes standard .625 Aluminum Bolt Extension
  • Includes castle nut wrench
  • Fit: Platforms .223/5.56 to .308 & Most 9mm
  • Does NOT work with Tippmann 22 or LWRC Pistols
  • 9mm bolt carriers with standard sizing, 5/8 ID (.625) can use the included bolt extension after removing the pin and weight from the back of the BCG
  • Now Compatible with Silent Capture Buffer Springs if you use our Silent Capture Bolt Extension  (Does NOT work with Armaspec Silent Capture)
  • 300 blk (blackout) compatible
  • If your bolt carrier group is causing the bolt extension to come up short contact us for a conversion
  • Includes all items needed to install.
Direction of fold

Adapter Opens To The Left, Adapter Opens To The Right

1 review for AR15 & AR9 Folding Stock Adapter Gen. 4

  1. Daniel Lederman (verified owner)

    Really impressed with the new model. It’s 2.5 ounces lighter than my law tactical and the same size. It very well on my
    Lower and locks fully. Great warranty as well. I’m Very satisfied with it

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