Rival Arms Ra50G111S Guide Rod Assembly Fits Glock 17 Gen 4 Stainless Steel With Titanium Finish Rival Arms is an up and coming company of individuals who have devoted themselves to individuals who demand more. Rivals Arms motto is more accuracy and more performance, because sometimes standard equipment just isn't good enough. Rival Arms uses a coalition of machinists and designers and coaters to provide you with the highest quality products possible. This particular guide rod assembly features a assembly drop in guide rod assembly. The guide rod is made from stainless steel and the spring is a premium spring with a stock weight. Specifications and Features: Rival Arms Guide Rod Assembly RA50G111S Complete Drop In Assembly Premium Spring (Stock Weight) Fully Assembled Rod is CNC-Machined from Solid Stainless Steel Billet Stronger more corrosion resistant part No Gunsmith Required Limited Lifetime Warranty Black Finish Fits: GLOCK Gen4 G17 Models Only