This is a stainless steel guide rod for a Ruger SR-9 pistol Handgun out of 304 stainless steel. The rod is made of only the finest stainless steel material to replace the plastic factory rod in your Ruger SR-9. Our rods are measured to factory specification and we ensure the finest fit and finish on all of our parts. These parts are now available for your Ruger SR-9 firearm. Be confident in your firearm and add a stainless steel guide rod for your Ruger today. This is a drop in unit that comes with a spring as well.