LanTac USA LLC, Flared Head Guide Rod, Fits Gen 1-3 Glock 19 (Will Fit Gen 4 with Lantac Adapter), Stainless Steel, Silver NEW Fits all Gen 1-3 Glock 19 Pistols Fits Gen 4 Pistols with use of the GB-G4 Adapter Bushing Not for use with flat wire springs Manufactured in the USA Product Description The Upgraded Flared Head, Non Captive Guide rod is machined from 17-4PH Stainless Steel & hand polished to give an ultra smooth surface finish. Available in Stainless & QPQ Nitride coating. The flared head creates a more concentric and consistent lock up of the slide, spring & rod.