Tyrant CNC(R) S&W M&P 9/40 Full Size +5 Round Grey Aluminum Magazine Extension is a magazine accessory intended for S&W M&P 9/40 Full Size. It features a grey finish. The listed construction material is aluminum.Key Features5-round extension or accessory specificationPlatform: S&W M&P 9/40 Full SizeColor/finish: GreyConstruction: AluminumManufacturer part number: TDMPMAGEXFSGREYTyrant CNC(R) offers firearm-related products and accessories. Product selection includes components for compatible firearm platforms. Check the manufacturer part number and firearm compatibility before purchase.