Sylvan Arms AR-15 & AR-9 Folding Stock Adapter - Gen 4 - Left Folding

Manufactured by Sylvan Arms
SKU: ARH400-L
MPN: ARH400-L
Manufactured by Sylvan Arms
22 Reviews
$177.99

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Details

Details

The Sylvan Arms Gen 4 AR-15 Folding Stock Adapter is compatible with 5.56 and 9mm pattern rifles and allows you to fold your stock for a more compact package for storage. Installation is even easier with the Gen 4, it simply screws into the receiver in place of your buffer tube. From there screw your buffer tube into the folding adapter. A great improvement for the Gen 4 folding adapter is that you now have the ability to install your take-down pin detent and detent spring via a screw port in the adapter itself. The Sylvan Arms Gen 4 AR-15 Folding Stock Adapter offers some other great improvements such as added QD sling attachment points, and a stronger and tighter lock up. The Gen 4 folding stock adapter is still CNC machined from 7075-T6 aluminum with a heavy duty hinge that provide amazing durability. The Sylvan Arms Gen 4 AR-15 Folding Stock Adapter is finished in a hardcoat anodized black for a lifetime of corrosion resistance.

Note: Do not fire when open.

Features:
  • Folds to the left
  • Compatible with all AR platforms
  • Compatible with 9mm
  • CNC machined from 7075-T6 aluminum
  • Hardcoat anodized black
  • Includes a .625 Aluminum Bolt Extension compatible with the JP silent capture spring
  • Includes castle nut wrench
  • Thread specifications: 1-3/16″ X 16
  • Hinge weight: 6.0 oz
  • 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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Specifications

BrandSylvan Arms
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

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Ratings & Reviews

22 reviews

4.6
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Excellent Quality!

by

This adapter is built like a tank! The construction is solid, the fold is smooth, and it locks up tight with zero play. Perfect addition to my AR setup—makes storage and transport way easier!

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Easy Installation and Works Flawlessly!

by

Installing this adapter was a breeze, and it functions perfectly. It’s well-built, and I love how securely it locks in place when extended. Great upgrade!

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Transforms Your AR for the Better!

by

If you want a more compact AR without sacrificing performance, this is the way to go. The fold is tight, and there’s no extra play when locked. Perfect for any setup!

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A Must-Have for Tactical Builds!

by

This adapter is one of the best investments I’ve made for my AR. It’s rugged, reliable, and works great with my buffer system. Feels like a premium upgrade!

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Solid Lock-Up and Smooth Operation!

by

The machining on this adapter is excellent. It folds and locks effortlessly, and I haven’t had a single issue with durability. Highly recommend!

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Best Folding Adapter on the Market!

by

I’ve tried other brands, but Sylvan Arms got it right with this one. The left-folding option is great, and the overall construction feels rock solid. Couldn’t be happier with my purchase!

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Works Good and lightweight

by

Overall great build quality, so much easier to install and more lightweight than the other brands - would recommend highly to anyone.

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A very good product, so far.

by

I love the gen 4. A bit tricky to install. If I have problems I will get a gen 5.

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Junk

by -

I installed it on my ar15 556 and it didn’t work I spend over 3 hours to make it happen, it robs inside the folding body mount and it makes it hard to slide it was getting stuck inside, just wasted money now the folding is sitting in my junk drawer

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Stick with the proven brand

by -

I wanted to be very excited about this product. Initial impression was good...

However, I cannot recommend this product after it failed following the first 10 rounds of ammunition. The tang/tab that holds the folder in the locked position cleanly snapped off.

Additionally, this product does not automatically lock into place when you fold the stock into the extended position, a button press is required.

Do yourself a favor and buy the (other) trusted brand, there's a reason it's the industry standard.

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