Night Fision Holosun 507k/407k Adapter Plate Black. Crafted from premium 17-4 stainless steel and built to the tightest tolerances these plates withstand harsh recoil and ensure a secure accurate fit. The nitride coating provides extra protection and each package includes extra screws and an installation tool for easy setup. Offering professional-grade reliability at an affordable price Night Fisions optic plates are perfect for both everyday shooters and professionals. Specifications for Night Fision Holosun 507k/407k Adapter Plate: Manufacturer: Night Fision Optic Cut: Springfield Prodogy Fabric/Material: 17-4 Stainless Steel Color: Black Gun Model: Springfield Armory Hellcat Features of Night Fision 507k/407k to Springfield Hellcat Red Dot Plate Compatible with Springfield Hellcat OSP models Fits Holosun 507k and other optics with compatible mounting footprint. See Pairing Guide for more optic compatibility. Machined from 17-4 Stainless Steel & Nitride coated Optic Plate thickness: 0.08 Pair with Night Fision 248-268 height backup sights for lower 1/3rd co-witness Package Contents: Night Fision 507k/407k to Springfield Hellcat Red Dot Plate What firearm models does the manufacturer say Night Fision Holosun 507k/407k Adapter Plate is compatible with? The manufacturer suggests that Night Fision Holosun 507k/407k Adapter Plate is compatible with Springfield Armory HellcatNight Fision SPR-OP-507k-Hellcat: Holosun 507k/407k Adapter Plate Black