For those of you on the fence about whether or not the XML is worth the money, let me tell you it is! I'm not new to the mounted weapon light arena either. I own an Insight Technologies M5 weapon light for one of my SW99s, as it is the only one they offer to fit it well, and I have a Surefire mounted on my AR handguards. That little XML is the sturdiest of them all and is extremely well made. Well worth the investment of under $100 from Pistol-Gear to illuminate any threat. Excellent product!!