White Sound Defense (WSD) has released the GLOCK 19/23/32/38 version of their guide rod. I previously had the chance to review the G17/22 version and found that it worked as well as other guide rods with the additional stand-off feature.
WSD designs their guide rods with a couple of unique features. The most obvious feature is the extended length. The guide rods are designed to extend slightly beyond the front of the slide. This allows the guide rod to serve as a stand-off to prevent the slide from being pressed out of battery in event that the the GLOCK must be pressed into the body of an attacker. Additionally, their guide rods have a small hole in them that allow you to use a paper clip to wind the spring onto the rod, making installation much easier.