Griffin Armament 3-Lug adapter (3L1351LH) for 9mm Luger barrels with M13.5×1 LH threads. HK-pattern interface; 17-4 stainless steel construction with Black Melonite QPQ finish.
This Griffin Armament 3-Lug adapter (model 3L1351LH) provides an HK-pattern interface for mounting compatible 3-lug silencers to 9mm Luger barrels threaded M13.5×1 left-hand. Constructed from 17-4 stainless steel and finished with Black Melonite QPQ, the adapter is engineered for secure, repeatable alignment with any 3-lug silencer made to the HK pattern, and is compatible with Griffin 3-lug interface assemblies. Its compact 1.43″ length keeps overall profile low while providing solid engagement with the host barrel.
Product Specifications
The model is 3-Lug.
The finish is Black Melonite QPQ.
The material is 17-4 Stainless Steel.
The overall length measures 1.43 inches.
The product type is Adaptor.
The subcategory is Muzzle Devices.
The fit/thread specification is M13.5×1 LH.
The intended chambering listed is 9mm Luger.
The adapter uses an HK-pattern 3-lug interface.
Compatibility is listed as Works with HK-pattern 3-lug silencers and Griffin 3-lug interface assemblies.
The manufacturer’s part number is 3L1351LH.
The UPC is 791154082072.
This adapter is a straightforward solution for shooters who need a robust, low-profile method to mount HK-pattern 3-lug silencers to left-hand threaded 13.5×1 barrels. Its 17-4 stainless construction and Black Melonite QPQ finish offer corrosion resistance and service life suitable for regular range use and competition settings where repeatable alignment and low profile are valued.
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