*This is an unique Weaver to Weaver mount adapter. It lets you mount two Weaver rails back-to-back. *For example, If you have a stockless airsoft shotgun with top Weaver rail, you can mount it to the bottom of an quad-rail airsoft assault rifle. *Great for airsoft and paintball fun! This adapter will also work for Picatinny rails and NATO accessory rails. This adapter is designed for air guns, airsoft guns, and paintball markers. *This package includes the adapter, six black screws, and six black nuts. Airsoft equipment used for illustration of this Weaver Rail to Rail Adapter are not included. *This adapter is made out of high quality nylon polymer (a type of plastic that is strong and resilient); much stronger than ABS plastic. ***WARNING: Although you can use this mount adapter on your real firearm, we have never tested it on a real firearms before. We do not know if the firearm heat/recoil will or will not damage it. Use it with real firearms at your own risk.Airsoft3D