Nighthawk Custom Guide Rod w/Relief Cut Solid Gov. Stainless Fully Machined. These high-quality parts aid in smooth reliable cycling by completely capturing recoil spring to prevent it from binding or deforming. These parts add extra weight up front to reduce muzzle flip for improved control and fast follow-up shots. With the guide rod machined out of a solid steel billet there are no threads to work loose compromising your firearm. The backside of the guide rod has been beveled to prevent contact with the lower lugs. Specifications for Nighthawk Custom Guide Rod w/Relief Cut: Manufacturer: Nighthawk Custom Fabric/Material: Steel Gun Make: 1911 Platform Gun Model: 1911 Package Contents: Nighthawk Custom Guide Rod w/Relief Cut What firearm models does the manufacturer say Nighthawk Custom Guide Rod w/Relief Cut is compatible with? The manufacturer suggests that Nighthawk Custom Guide Rod w/Relief Cut is compatible with 1911Nighthawk Custom SP0175: Guide Rod w/Relief Cut Solid Gov. Stainless Fully Machined