Love it
"Awesome light that I have on my Glock 19. Does it wobble? Yes, but it’s an easy fix. The X300-UA compared the B does have some play in it on the rail but all you need is some strips of electric tape or in my case I used some strips of Velcro with adhesive backing. It takes up the slack and makes it very sturdy. I also installed a Thumb Cliff from QVO Tactical on this light that acts as a thumb ledge for extra support."