The TLR-7 X sub features multi-fuel battery capability powered by either one (1) CR123A or one (1)Streamlight SL-B9 lithium-ion rechargeable battery pack, both delivering 500 lumens and 5,000 candela. The integrated rail clamp is designed to rapidly attach/detach from the side of the weapon, providing smooth installation and removal without having to put your hands in front of the muzzle. The specialized clamp system allows for mounting on 1913 short railed subcompact handguns including: the Smith & Wesson M&PM2.0 subcompact, Beretta Px4 Storm subcompact, Springfield Armory XD-E, XD-S and Hellcat Pro, Heckler & Koch HK45 compact, and SIG SAUER P365 XMACRO.