The Beretta CX4 Bottom and Side Accessory Rail Kit can be used with the side rail provided with the CX4 Storm carbine to finish out the two side rail positions and adds a bottom rail for a vertical grip. It allows for attachment of any weaver mount assembly and is ideal for scopes, lights, lasers, grips and more. It is made of black polymer and comes with four mounting screws.
Specifications:

Type	Bottom/Side Rail Kit
Model	Beretta CX4
Dimensions	Picatinny
Size
Material	Composite
Action
Trigger
Safety
Thread Pattern
Finish	Black
Bolt Type
Hand
Hammer Type
Max Capacity