Sylvan Arms Folding Stock Adapter For AR15 - ARH300

  • Model: RR/ARH300
  • 12 Units in Stock
  • Manufactured by: Sylvan Arms

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Sylvan Arms AR15 Folding Stock Adapter - ARH300 THIS ITEM QUALIFIES FOR FREE SHIPPING


    - Made in the USA by Sylvan Arms
    - Manufacture Part# ARH300   
    - Model: AR Folding Stock Adapter
    - Fit: AR15 rifle and pistol platforms .223/5.56 to .308 & most 9mm
    - 9mm bolt carriers with 5/8 ID (.625) standard sizing can use the bolt extension included, after removing the pin and weight from the bolt carrier
    - 17/32 .531 bolt extension for smaller bolt carriers is available here
    - If your PSA bolt carrier is causing the bolt extension to come up short contact us for a conversion.
    - Does NOT work with Silent Capture Buffer Springs
    - Does NOT work with JP Enterprise Buffer System

    - 300 blk (blackout) compatible
    - Adds 1.3 inches to Length of pull
    - Surface treatment: hard coat black anodized
    - Material: 7075 CNC-machined billet Aluminum
    - Thread specifications: 1-3/16? X 16
    - Hinge dimensions: 3 11/16 inches
    - Hinge weight: 6.0 oz, BC – Extension 3.1 oz
    - Hinge length: 1.3 inches
    - Manufacture limited lifetime warranty
    - Note this is just the folding mechanism, Does NOT included stock or extension tube

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

Specifically designed for gas piston and direct impingement systems 5.56 to .308 systems, as well as .223 compatible, it has standard 1-3/16” x 16 thread and does not require any additional parts to be used with standard BC 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. No special tools required; only a standard armorer’s wrench. The product does not need to be disassembled in order to install it on to your rifle/pistol.

Simply screw on, fold, and carry!

Note that weapon CANNOT be fired when folded

CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

Brand New With Manufacture Warranty

It is the responsibility of the buyer to research and obey all applicable local, state, and federal laws in regard to the possession, use, and sale of any products purchased from

This product was added to our catalog on Tuesday 15 June, 2021.


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