Nighthawk Custom Mag Catch lock and Spring Hex Head Fully Machined Black Melonite Finish. Fully Machined from premium-grade 416 stainless steel for long-lasting life and wear resistance these parts are perfect for factory replacement or to compliment your custom 1911 build. Gunsmith fitting may be required The Nighthawk Custom line of Fully Machined parts are designed to be the gold standard in the 1911 parts industry. All Fully Machined parts have been fully CNC machined from solid steel billets. We never use cast metal injected moldings or polymer parts. In order to create the Worlds Finest 1911s only the best materials can be used. That is why you can trust Nighthawk Custom Fully Machined parts in your 1911. Specifications for Nighthawk Custom 1911 Magazine Release Lock and Spring: Manufacturer: Nighthawk Custom Gun Make: 1911 Platform Gun Model: 1911 Fabric/Material: Steel Weight: 0.5 lb Package Contents: Nighthawk Custom 1911 Magazine Release Lock and Spring What firearm models does the manufacturer say Nighthawk Custom 1911 Magazine Release Lock and Spring is compatible with? The manufacturer says that Nighthawk Custom 1911 Magazine Release Lock and Spring is compatible with 1911Nighthawk Custom SP0219: Mag Catch lock and Spring Hex Head Fully Machined Black Melonite Finish