One Piece Picatinny Rail; Domestic 6061 T6 Extruded Aluminum Construction; Matte Black Anodized Finish; #6-48 X 1/4 Screws and T-10 Bit Included; Mounting Hardware: Hex Head Screws and Wrench Provided; Picatinny cross slots run the full length of the rail, which gives the shooter flexibility when mounting scope rings and other accessories; The channel in the center reduces the overall mass of the mount; Picatinny-style base that compatible with Picatinny or Weaver scope rings; Matte Black Finish