Quick Tip: SureFire X300UA vs X300UB - The Difference

   Continuing our series about SureFire lights, Caleb is again joined by Andrew Wright from SureFire, who gives us the skinny on what makes the X300UA gun light different from the X300UB model. It's all about the mounts. The X300UA's mount has a quick-attach / detach spring-loaded plate. Depress the tabs on both sides of the light, slide it onto the gun's accessory rail, feel the wedge on the mount index into a slot on the rail, and release the buttons to lock the X300UA on the rail. This mount makes it easy to swap the light between different firearms very quickly. But due to variations in rail specs, the X300UA might wobble a little on some rails. To help fix that, the X300UA comes with two interchangeable wedges. The Universal wedge fits rails found on Glocks, Smith & Wesson M&Ps, and similar modern pistols. The popular M1913 Picatinny rail slot is a little wider, so for that there's the "P" wedge. For folks who want a totally wobble-free installation, SureFire offers the X300UB. Its mount locks down tight via a thumbscrew, so putting it on the gun and removing it takes longer than the A model. But the B mount eliminates unwanted "play." Like the X300UA, it comes with both Universal and Picatinny wedges, so the X300UB will fit almost any handgun with an accessory rail.