*This Two-Picatinny-Rails Adapter converts a single Picatinny rail to two side-by-side parallel rails. It can also convert a single Weaver rail to two side-by-side Picatinny rails. It allows you to attach two Picatinny accessories to a single rail. The distance between the two side-by-side rails are 15mm apart. *This adapter is designed for airsoft guns, paintball markers, and firearm replicas. This adapter is paintable. *This package includes the adapter, a black screw, and black nut. Airsoft equipment used for illustration of this Two-Picatinny-Rails Adapter are not included. *WARNING: Although you can use this mount adapter on your real firearm, we have never tested it with real firearms. We do not know if the firearm heat/recoil will or will not damage this adapter and any accessories attached to it. Use this adapter with real firearms at your own risk. *According to US law, this item ship only in the United States.Airsoft3D