Overwatch Precision Serrated Aluminum Slide Cover Plate for Glock Gen 1-4 Black. No pointless sayings or designs just a functional high-quality slide cover plate to top off your striker-fired pistol. It's made of Type III anodized 7075-T6 aluminum and is serrated (80 LPI) for glare reduction and general sexiness. This slide plate cover is specifically designed for a Glock owner and is one of the best aftermarket gun parts for glare reduction. Will not fit G42 43 43X and 48. Specifications for Overwatch Precision Serrated Aluminum Slide Cover Plate for Glock: Manufacturer: Overwatch Precision Fabric/Material: 7075-T6 Aluminum Finish: Type 3 Anodized Gun Make: Glock Package Contents: Overwatch Precision Serrated Aluminum Slide Cover Plate for Glock Overwatch Precision 21004: Serrated Aluminum Slide Cover Plate for Glock Gen 1-4 Black