Fixxxer Psalm 144 design Rear Slide Cover Plate for Smith & Wesson S&W M&P full size & compact pistol LLC T6 Aluminum, Hard coat anodized, Laser engraved Psalm 144 design,easy to add to your for S&W M&P Full Size & Compact 9mm .357 .40 .45 Great replacement for a factory part. All designs are laser engraved. Fits S&W M&P Full Size & Compact 9mm .357 .40 .45, Easily installed and removed with no permanent modifications. Manufactured by Fixxxer LLC