Replace the Rail Guide of your SUREFIRE X300U-B, XH35 & X400U weapon lights with this and give your thumb a better purchase to control your pistol for faster follow up shots. Once you try this there is no going back. A must have if you use one of these weapon lights on your defensive handgun.
 
Made from durable Aluminum.....Comes in both right and left handed versions and black or desert tan.