Nighthawk Custom Retrofit 1911 Parts Kit .45acp Govt. Carbon Steel. Transform your current 1911 or build your dream pistol from the ground up with parts that have been Fully Machined from high-quality steel billets creating the most reliable durable 1911 parts on the market. Specifications for Nighthawk Custom Retrofit 1911 Parts Kit: Manufacturer: Nighthawk Custom Gun Make: 1911 Platform Gun Model: 1911 Caliber: .45 ACP Package Contents: Nighthawk Custom Retrofit 1911 Parts Kit The Nighthawk Custom Nighthawk Retrofit 1911 Parts Kit .45acp Govt. Carbon Steel is a quality addition to the Nighthawk Custom lineup. For more great deals on Pistol Slides & Slide Parts by Nighthawk Custom please browse our Nighthawk Custom Gun Parts page. What firearm models does the manufacturer say Nighthawk Custom Retrofit 1911 Parts Kit is compatible with? The manufacturer says that Nighthawk Custom Retrofit 1911 Parts Kit is compatible with 1911Nighthawk Custom Nighthawk Retrofit 1911 Parts Kit .45acp Govt. Carbon Steel