Quantity：2 piece(s) per pack  Color：Black Material：Aluminum AlloyGun Type  Suitable for：G36  Suitable Caliber：20 mm  Specification：20mm picatinny rail， Fits G36， good for DIY  Packing List  2 x Picatinny rails     4 x Screws     1 x Hex wrench<img src="http://112.74.112.28/down/products/146062/146062_000.jpg" noproxy>