Unlike a traditional KeyMod Mount, IWC's Bipod Mount is placed through the round hole in the KeyMod pattern and is secured by placing an O-Ring around the shaft against a shoulder on one end, which provides tension against the inside of the handguard while a c-clip placed into a groove machined into the shaft is used to secure the Bipod Mount shaft against the outer surface of the hand guard. Single piece shaft stud design CNC Machined from billet 303 Stainless Steel. Plated with Black Melonite to prevent rust, corosion or wear during a lifetime of use. Weighs less than an ounce. Proudly Made in America by Impact Weapons Components, LLC..