Nighthawk Custom Thread Protector w/.578 X 28 Threads for .45 Barrels Stainless Fully Machined

Nighthawk Custom Thread Protector w/.578 X 28 Threads for .45 Barrels Stainless Fully Machined. Specifications for Nighthawk Custom 1911 Thread Protector: Manufacturer: Nighthawk Custom Color: Stainless Gun Model: 1911 Fabric/Material: Stainless Steel Package Contents: Nighthawk Custom 1911 Thread Protector What firearm models does the manufacturer say Nighthawk Custom 1911 Thread Protector is compatible with? The manufacturer suggests that Nighthawk Custom 1911 Thread Protector is compatible with 1911Nighthawk Custom SP0451: Thread Protector w/.578 X 28 Threads for .45 Barrels Stainless Fully Machined