Magazine Base Plate for Smith & Wesson M&P 9mm/40 Gadsden - Don't Tread on Me CNC created, holds dimensions to factory specs Black hardcoat type 2 anodized aluminum. Matte black finish Fits Smith & Wesson M&P 9mm & 40 cal Permanent laser engraved etching Made in the US by Molon Labe Engraving