The Rival Arms RA50G111S Guide Rod Assembly fits Glock 17 Gen 4 and is constructed from solid stainless steel with a titanium finish. This guide rod assembly addresses common issues associated with plastic guide rods, such as chipping, cracking, and flex that can affect accuracy and reliability.Key FeaturesMaterial: CNC-machined from a solid stainless steel billet for enhanced strength and corrosion resistance.Assembly: Fully assembled with a premium spring of stock weight for reliable performance.