Picatinny Weaver Rail Mount flat base set made of black ABS Plastic. Ideal for attaching lights, laser, optics, bipods, forward grips etc Yes you get all 3 rails and 7 screws and nuts. 1x 5 slot 54mm long 1x 7 slot 75mm long 1x 13 slot 135mm long 21mm wide 9mm high Choose which mounting option you want; 1) keymod screws and nuts 2) Mlok screws and nuts