Wilson Combat's one piece full-length guide rod will make your 1911 operate and cycle smoother. The rod extends recoil spring life, improves cycling and overall operation, extends life of slide to frame fit and improve barrel to slide fit and accuracy on older military 1911's. The guide rod replaces your stock recoil spring guide without pistol modification. Assembly and disassembly are the same as with stock components (bushing wrench is required). *Note- we recommend using our #22 or #22P Barrel Bushing Wrench with this product.