GRIFFIN 3-Lug Adapter 1/2x36 - Precision Machined Firearm Accessory

The Griffin Armament 3-Lug Adapter in 1/2x36 is a precision-machined accessory that lets you use any standard HK-pattern 3-lug silencer on your rifle. Built to strict HK specifications, this adapter ensures reliable, repeatable mounting for suppressors designed to that common interface standard. Whether you're upgrading an existing suppressor setup or building out a modular sound reduction system, this adapter is the mechanical bridge that makes it all work together.

Constructed from 17-4 stainless steel and finished with Melonite QPQ treatment, the Griffin 3-Lug Adapter delivers the durability and corrosion resistance you need in field conditions. The precision machining means tolerances are tight and repeatability is consistent—important when you're relying on your suppressor for accuracy and reliability. The QPQ coating adds hardness and wear resistance, so the adapter handles the stress of repeated mounting and firing cycles without degradation.

This is the kind of behind-the-scenes accessory that doesn't get noticed when it works right, but makes a real difference in system reliability. If you're running a rifle with a 1/2x36 barrel and want the flexibility to use market-standard 3-lug suppressors, this adapter removes the guesswork and gives you a solid foundation.

Key Features

• HK-pattern 3-lug interface—compatible with any suppressor built to this standard
• 17-4 stainless steel construction for strength and corrosion resistance
• Melonite QPQ treatment for enhanced durability and wear resistance
• Precision machining for consistent, repeatable mounting
• 1/2x36 thread pitch and mounting configuration

Specifications

Frequently Asked Questions

Will this adapter work with my suppressor?

This adapter is designed for HK-pattern 3-lug silencers and will work with any suppressor manufactured to that standard. If your silencer uses a different mounting interface (piston, direct thread, etc.), this adapter won't be compatible. Check your suppressor's specs to confirm it's 3-lug HK-pattern.

What rifle barrel thread is this adapter for?

The Griffin 3-Lug Adapter is configured for 1/2x36 barrel threads, which is the standard thread pitch on many rifle platforms. Confirm your barrel is threaded 1/2x36 before ordering.

Is this made by Griffin Armament?

Yes, this is an authentic Griffin Armament precision-machined adapter, built from 17-4 stainless steel and Melonite QPQ treated for long-term reliability.