Griffin Armament 3 Lug Adapter 13.5x1MM
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The 3 Lug adapter from Griffin Armament is an HK pattern adapter that will work on just about any 3-lug type of silencer that is made to the same standard. The adapter will also be functional with any interface assembly that is Griffin 3 lug. This version of the 3-lug adapter comes with a machined extension that is cylindrical added straight onto the mount. The 13.5mm version comes with flats that you can use a wrench on. There is also an interface with an O-ring that is typical of most 13.5mm mounts. The 5/8×24 version is a smaller and is better for providing a stable 3-lug mount to .30 caliber type barrels. However, they are also able to be used with 9mm barrels where the thread is common. Almost all of the 30 caliber style barrels use a thread pitch of 5/8×24. This adapter is built from stainess and melonite and are QPQ treated.