The Griffin Armament 3-Lug barrel adapter for 9mm in 13.5×1 LH (Griffin part no. 3L1351LH) gives a threaded 9mm barrel a quick-detach 3-lug mounting point. It follows the H&K pattern, so it works with any 3-lug silencer made to that standard as well as Griffin’s own 3-lug interface assemblies. This 13.5×1 LH version adds a cylindrical machined extension with wrench flats and the O-ring interface typical of 13.5×1 LH mounts. It is cut from 17-4PH stainless and Melonite QPQ treated for a hard, wear-resistant surface.

Key Specifications

• The caliber is 9mm, the platform this barrel adapter is sized for.
• The thread is 13.5×1 LH, a left-hand metric pattern used on many 9mm barrels.
• The interface is a 3-lug QD pattern in the H&K style, compatible with standard 3-lug suppressors.
• It has a cylindrical machined extension with wrench flats, which makes installation with a wrench straightforward.
• The extension carries an O-ring interface, which is typical of 13.5×1 LH mounts.
• It is made of 17-4PH stainless steel, chosen for strength and corrosion resistance.
• The surface treatment is Melonite QPQ, a nitride process that adds hardness and wear resistance.
• Griffin backs it with a perpetual lifetime warranty.

Frequently Asked Questions

Which suppressors will this 3-lug adapter work with? Griffin states it works with any 3-lug silencer made to the H&K pattern and with Griffin 3-lug interface assemblies.

What thread does it have? This version is 13.5×1 LH, left-hand, and is sized for 9mm barrels.

How is it different from the other 9mm 3-lug adapters? Griffin also makes the 9mm adapter in 1/2×28, 1/2×36 and 5/8×24. The 13.5×1 LH version is the one with the wrench-flat extension and O-ring interface.

Buy the Griffin Armament 3-Lug Barrel Adapter, 9mm, 13.5×1 LH

Griffin machines this adapter for shooters who want a fast, repeatable mount on a left-hand 13.5×1 barrel. Order it and we will ship it direct from our Lubbock, Texas gun shop. See more in our Class 3 parts and accessories.