Sylvan Arms AR-15 Folding Stock Adapter - Gen 3

Manufactured by Sylvan Arms
Manufactured by Sylvan Arms
25 Reviews

In Stock

Standard orders will ship out 2 business days if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



The Sylvan Arms Gen 3 AR-15 Folding Stock Adapter is compatible with 5.56 and .308 pattern rifles and allows you to fold your stock for a more compact package for storage. It simply screws into the receiver extension slot where your buffer tube would and then you screw your buffer tube into the stock adapter. The gen 3 folding stock adapter is CNC machined from 7075-T6 aluminum with a heavy duty hinge and hardcoat anodized black for long term corrosion resistance.

Note: Do not fire when open.

  • Compatible with all AR platforms
  • Compatible with 9mm with Sylvan Arms 9mm bolt conversion (not included)
  • CNC machined from 7075-T6 aluminum
  • Hardcoat anodized black
  • Includes buffer extension
  • Includes castle nut and end plate
  • Thread specifications: 1-3/16″ X 16
  • Hinge dimensions: 3 11/16 inches
  • Hinge weight: 6.0 oz, BC – Extension 2.2 oz
  • Hinge length: 1.3 inches
  • Limited lifetime warranty

From 9mm conversion blocks, to rifle tools, to stock adapters, Sylvan Arms produces premium, affordable, firearms, gunsmith tools, and accessories.
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BrandSylvan Arms
MaterialAluminum - 7075-T6
StorageNot Storage Capable
Weight6 oz.

Ratings & Reviews

25 reviews

  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Sylvan Arms folding stock adapter


Very well made and priced right. See no difference in quality between this and the more expensive folder out there for twice the price. Will buy again.

Well Made


This is a very good value. But there is one issue - it will effectively increase your reciprocating mass by over an ounce. The reason is that the standard bolt carrier extension that comes with the kit is nitrided steel. It weights about 1.4 ounces. That's like adding 1.4 ounces to your 3 oz. buffer. They do offer an aluminum one for less than 10 bucks. I needed one for a .300 BLK build to properly cycle subs in a backpack gun.

Good, not great


I bought one. Was happy with it, so I bought another for my other AR. Strange. The first one folded completely open, so stock was parallel to barrel. Second one, not so much. Would not fold completely flat. Also, after a few hundred rounds they both jiggle a little bit, which is probably not a huge deal. But still, it’s a little unnerving to feel & hear your gun jiggle as you’re shouldering it. Next time I think I’ll give the Law Tactical folder a try instead

Gret Addition

by -

Bought this as opposed to other higher priced options out there and have to say I'm impressed. Has worked great, excellent value, and will get more of these in the future!

Great addition


I put this on an AR pistol for the obvious reason. Installation was a bit of a pain and it works as advertised but the 4 stars is for the open position. I would like for there to be more positive lock to hold it open. If you shake the weapon a little, it comes unlocked and the stock swings away. No biggie.....I still like the addition.