NDZ Performance for Glock Rear Ambi Speed Slide Racker Plate MOS Optics Black for Gen 1-5 Most Models - Plain Speed Slide Racker Rear Plate MOS for Glock Gen 1-5 Models: 17 17L 19 20 21 22 23 24 26 27 29 30 31 32 33 34 35 36 37 38 39 40 41 Plain Black 100% Aircraft Grade Billet Aluminum, Mil-spec hardcoat anodized durable finish Replaces Stock Plastic Plate, quick install, requires NO modifications All Our Accessories Are Made In Usa, In Our Facility - Comes In NDZ Packaging