The Strike Dual Folding Adapter is a versatile and innovative patented system that offers unparalleled convenience and flexibility. With its intuitive folding mechanism, it can fold to either the left or right side of the weapon platform. Without the need to reconfigure or reinstall any parts, the provided locking mechanism has a positive lock and ensures its ability to stay in place. This adapter fits directly onto a 1913 Picatinny interface with built-in locking lugs for secure attachment. The included Stock end is a great ergonomic option for completing a build. Strike's Dual FSA's name comes from its ability to fold to the left and to the right - as well as its interchangeability to swap out the Stabilizer end to a Stock end. Use it with most 1913 Picatinny rear ends, including the Strike AR Picatinny Stock Adapter, or any factory OEM weapon with a Picatinny rail.