Nighthawk Custom Plug Recoil Spring Checkered Front Gov. Stainless Fully Machined. A Guide Rod Plug is one of the many small parts that need to be protected from wear and tear; guide rods are one of those things that need to be protected. Without high quality parts your 1911 may not be able to perform to the standards you have come to expect from a 1911. It is the precise part that properly sets the alignment pin. Without it your gun won't be able to lock up. Additionally guide rods and associated parts with a plug are prone to wear and tear much quicker than an integral spring due to constriction. These Nighthawk Custom FM Series parts are designed to be the gold standard in the 1911 parts industry. All Fully Machined parts have been fully CNC machined from a solid steel billet. We never use cast metal injected moldings or polymer parts. In order to create the world's best 1911s only the best materials can do so. That is why you can trust Nighthawk Custom Fully Machined parts in your 1911. Specifications for Nighthawk Custom 1911 Guide Rod Plug: Manufacturer: Nighthawk Custom Gun Make: 1911 Platform Gun Model: 1911 Weight: 0.5 lb Package Contents: Nighthawk Custom 1911 Guide Rod Plug What firearm models does the manufacturer say Nighthawk Custom 1911 Guide Rod Plug is compatible with? The manufacturer says that Nighthawk Custom 1911 Guide Rod Plug is compatible with 1911Nighthawk Custom SP0319: Plug Recoil Spring Checkered Front Gov. Stainless Fully Machined