Energetic Armament EA22 Direct Thread Adapters 1/2x28 Titanium
https://www.tandktactical.com/shop/853406008220-energetic-armament-ea22-direct-thread-adapters-1-2x28-titanium-42074
https://www.tandktactical.com/web/image/product.template/42074/image_1920?unique=f43c0c4
fits Industry standard 1.375"x24 thread
