The Yankee Hill Machine 638 is an adapter designed to enable the connection of a Harris Bipod to any picatinny rail. The adapter is constructed of high-quality aircraft grade aluminum, ensuring durability and strength.Further enhancing its robustness, the adapter undergoes a hardcoating process in compliance with military specifications or higher, resulting in a sleek, anodized matte black finish.With dimensions of 2.6\" in length and a lightweight profile at 2.144 Oz, this adapter is both compact and easy to manage. The application process is straightforward and simple, requiring only a 7/64\" Allen wrench for attachment.