Machined from pre-hardened (H900 condition) 17-4PH (Precipitation Hargened) stainless steel, bead blasted to create a satin surface finish and then treated with a new proprietary Lithium-Ferro process that creates an ultra hard protective coating. RMR blanking plates are fitted as standard with Torx head screws and are machined with a continuous grip texture that flows from the slide across the plate. Please Note: Function is only guaranteed on 100% original Glock Frames with original or Lantac Barrels.