The Griffin Armament 3-Lug Adapter (brand part no. 3L1351LH) converts a 9mm Luger barrel threaded M13.5×1 left-hand to the HK-pattern 3-lug mounting standard, letting a shooter run any 3-lug-compatible mount made to that spec. Griffin Armament machines the adapter from 17-4 stainless steel and finishes it in black Melonite QPQ for real corrosion and wear resistance under repeated mounting and dismounting. Because it’s built to the industry-standard HK 3-lug pattern, it works with 3-lug suppressor mounts from other manufacturers, not just Griffin’s own hardware, and it’s also compatible with Griffin’s 3-lug interface assemblies for shooters already running Griffin gear. At 1.43 inches long, it adds minimal length to the muzzle.

Key Specifications

• Converts to the HK-pattern 3-lug mounting standard.
• Compatible with any 3-lug mount made to the HK standard.
• Also compatible with Griffin’s own 3-lug interface assemblies.
• Built for 9mm Luger barrels.
• Threaded M13.5×1 left-hand.
• Machined from 17-4 stainless steel.
• Finished in black Melonite QPQ for corrosion and wear resistance.
• Measures 1.43 inches long.
• Functions as a genuine mounting adapter, not a suppressor itself.

Frequently Asked Questions

What mounts does this work with? Any 3-lug mount made to the HK pattern standard, plus Griffin’s own 3-lug interface assemblies.

What thread pattern does it use? M13.5×1 left-hand, for 9mm Luger barrels.

What’s it made from? 17-4 stainless steel finished in black Melonite QPQ.

Buy the Griffin Armament 3-Lug Adapter – 9mm Luger, M13.5×1 LH, Black Melonite QPQ

Get your 9mm host onto the HK 3-lug standard for mount flexibility. Order the Griffin Armament adapter from our Class 3 parts and accessories selection at our Lubbock, Texas gun shop for fast, direct shipping.