Hk417/Mr762 Gen 3Hk Folding Stock Adapter

The Law Tactical Gen 3HK folding stock adapter brings the same space-saving design that made the original Gen 3 a favorite among AR builders to HK platform rifles. If you run an HK417, MR762, MR308, or G28, this adapter lets you fold your stock along the receiver for compact storage and transport—ideal when you need to stow your rifle in a tight space, vehicle, or pack. The single-button release makes deployment intuitive: push to collapse, pull back and lock to extend. No tools, no fuss.

Built from steel with a durable DLC finish, the Gen 3HK is engineered to handle repeated cycling and field use without sacrificing durability. The design works with any rifle sporting HK's proprietary receiver extension, so you're covered whether your setup is a duty rifle, competition platform, or hunting build.

The real advantage here is versatility. Folding stocks aren't just about looking tactical—they genuinely reduce your overall profile when the gun is slung or stored, and they can help with awkward vehicle placement or confined-space shooting positions. The automatic lock-back mechanism means the adapter secures itself when extended to full length, so there's no wiggle or uncertainty before you fire.

Key Features

• Single-button release for quick folding and unfolding
• Automatic locking when stock is extended to full length
• Steel construction with DLC finish for durability and corrosion resistance
• Compatible with HK417, MR762, MR308, and G28, plus any rifle with matching HK receiver extension
• Compact storage and transport without removing stock

Specifications

Frequently Asked Questions

Will this fit my HK417 or MR762?

Yes. The Gen 3HK adapter is designed specifically for rifles with HK's proprietary receiver extension, including the HK417, MR762, MR308, and G28.

How does the folding mechanism work?

Push the single-button release to fold the stock along the side of the receiver. To fire, move the stock back to full extension, and the adapter automatically locks into place—no additional steps needed.

What finish does it have?

The adapter is steel with a DLC (Diamond-Like Carbon) finish, which provides durability and corrosion resistance for field use.

Can I use this on other platforms?

The Gen 3HK is designed for rifles with HK's proprietary receiver extension. If your rifle uses a standard buffer tube or a different receiver extension system, you'll need a different adapter.