Description
Law Tactical basically invented the AR folding adapter category, and the GEN-S is the biggest step forward they've taken in a while. The headline change is the move from aluminum to CNC-machined 17-4 precipitation-hardened stainless steel with a DLC coating. That swap tackles the one thing folks worry about most with a hard-working folding hinge: how it holds up after thousands of open-and-close cycles, especially around salt, humidity, and general nastiness where aluminum tends to give up first.
It bolts onto the back of your receiver and lets the whole rifle fold to the side for low-profile storage, pack carry, or getting in and out of a vehicle. The operation is dead simple. Push one button, fold it, then unfold and it locks itself back into place with no fine motor skills required. When it's open, it functions like a standard receiver extension, so your gun runs exactly as it should. The GEN-S plays nice with both direct impingement and gas piston guns and fits A2, carbine, mil-spec, and commercial buffer tubes and stocks. It'll also handle standard bolt carrier groups across the board, from 5.56 up to .308.
What Sets the GEN-S Apart From the Gen 3-M
Besides the stainless housing, the GEN-S trimmed 1.1 ounces off the old Gen 3-M, which comes out to about 12.5 percent lighter at roughly 7.4 ounces. Law Tactical also beefed up the locking lug, locking latch, and threaded flange, and lowered the hinge position with a slimmer housing profile. That lowered hinge means less interference when you're working the charging handle, which is a nice quality-of-life touch you'll notice at the range.
Living With the GEN-S Adapter
Keep in mind the adapter adds a small amount of length behind the receiver, so you'll want a bolt carrier extension to make it all work, and pairing it with a compatible silent captured spring makes installation and function smoother. Maintenance is tool-less, with replaceable o-rings and an adjustable hinge tension so you can dial in how stiff or loose the fold feels. It's designed, built, and assembled in the USA, and reviewers consistently point to the solid build and reliability that hold up over the long haul.
Key Specifications
- Manufacturer: Law Tactical
- Manufacturer Part Number: 99329
- UPC: 728795099329
- NSN: 1005-01-672-4614
- Material: 17-4 Precipitation-Hardened Stainless Steel
- Finish: DLC (Diamond-Like Carbon) Coating
- Color: Black
- Housing Weight: Approx. 7.4 oz (12.5% lighter than Gen 3-M)
- Weight Reduction vs Gen 3-M: 1.1 oz
- Platform Compatibility: AR-15, AR-10, AR-9 / PCC
- Buffer Tube Fit: A2, Carbine, Mil-Spec, Commercial
- System Compatibility: Direct Impingement & Gas Piston
- Caliber Range: 5.56 up to .308
- Country of Origin: Made in the USA
What’s Included
- GEN-S folding stock adapter
- Threaded flange
- Bolt carrier extension
- Installation tool
- Extra o-rings
Frequently Asked Questions
What makes the GEN-S different from the Gen 3-M adapter?
The biggest change is the material. The GEN-S is machined from 17-4 stainless steel with a DLC coating instead of aluminum, which gives it stronger corrosion resistance for humid and maritime conditions. It's also about 12.5 percent lighter, with a slimmer housing, a lowered hinge, and a beefed-up locking lug, latch, and threaded flange.
Will the GEN-S folding stock adapter work with my AR build?
For most standard setups, yes. It works with direct impingement and gas piston guns and fits A2, carbine, mil-spec, and commercial buffer tubes and stocks. It handles standard bolt carrier groups from 5.56 up to .308, so it covers the vast majority of AR-pattern rifles.
Do I need anything extra to run the GEN-S?
The adapter comes with the bolt carrier extension you need to make up for the added length behind the receiver. Many folks also add a compatible silent captured spring, which smooths out installation and cycling with the adapter. Beyond that, you're set to install and go.
Can I fire the rifle while the stock is folded?
The GEN-S is built for a single emergency shot while folded, but it is not designed for sustained fire in that position. For normal shooting you unfold it, and it automatically locks back into place with no fuss. Once open, it functions just like a standard receiver extension and doesn't affect how the gun runs.





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