Griffin Armament 3 Lug Adapter


These 3 Lug adapters are HK pattern and will work with any 3 lug silencer on the market made to this standard. They will also work with Griffin 3 lug interface assemblies.

The 5/8×24 and 13.5x1mm LH versions have a cylindrical machined extension added to the mount. The 13.5mm version has flats for a wrench on that cylinder extension and has the O-ring interface typical of 13.5×1 LH mounts. The other 3 Lugs are the smaller version pictured.

The 5/8×24 is meant to provide a 3 Lug mount to 30 caliber barrels but is also compatible to 9mm barrels where that thread is uncommonly used. Most 30 caliber barrels are threaded 5/8×24 thread pitch.

1/2×28 Thread Total Length: 1.4375″. Based off of industry standard .625″ barrel threads, added length should be ~.8125″.
5/8×24 Thread Total Length: 2.125″. Based off of industry standard .625″ barrel threads, added length should be ~1.5″.

Made from 17-4ph stainless and Melonite QPQ treated.

Additional Information Content

Additional information

Thread Pitch

1/2×28, 13.5x1mm LH, 5/8×24

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