The C&H Precision plates are designed, manufactured and shipped from our small family owned business in Coastal Georgia. Each plate is precision machined to the tightest tolerances on HAAS CNC machines and each plate goes through multiple quality checks before shipping to our customers. SPECIFICATION: Material: Plates are made from 6061 aluminum. All mounting hardware is Stainless Steel Finish: Plates are MIL-SPEC Type III Hard Anodized - Black INCLUDED: Qty 1 - Optic Plate Qty 3- 4-40 x .354 FH Plate Mounting Screws Qty 2 - 6-32 x .625 BH Leupold Delta Point Pro Optic Mounting Screws Qty 2 - 6-32 x .375 BH SIG Romeo1 , SIG Romeo1 Pro , Nikon SPUR Optic Mounting Screws Qty 2- 6-32 x .3125 BH Vortex Venom Optic Mounting Screws Qty 2 - 6-32 x .4375 BH Vortex Razor Optic Mounting Screws Qty 2 - 6-32 x .4375 FH Burris Fastfire 3 , Vortex Viper Optic Mounting Screws Agency / Department Discount Program DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols. DRY-FITTING DISCLAIMER: At C&H Precision, our products are designed and manufactured to meet tight tolerances. Installation can be affected by variations in your plate, hardware, optic, and firearm tolerances. For safe installation and to prevent potential damage to any component, we advise dry-fitting all parts before a full installation. If any problems arise during this process, please reach out to our Customer Service via our contact portal. IRON SIGHTS DISCLAIMER: When making aftermarket firearm modifications, factory components can often become obsolete, particularly when mounting optics on the slide, whether through direct milling or using a plate. Achieving the correct height for low co-witness iron sights depends on factors such as the firearm type, mounting plate, optic, and slide cut. For assistance in determining the appropriate iron sight height for your specific setup, please contact our Customer Service team through our dedicated contact portal.