Fenix ALG-15 Offset Picatinny Weapon Rail Mount The Fenix ALG-15 is a tactical clamp mount for the staggered fixing of flashlights to Picatinny/MIL-STD-1913 weapon rail systems. The innovative rotary-knob design provides the option of tool-free installation and unmounting in four simple steps to keep you moving in high-stress situations. An ideal solution for military and law enforcement professionals as well as some security personnel and hunters, an Allen wrench is included for absolute precision setup before heading into the field. Versatile Size-Based Compatibility Whereas many weapon rail mounts are exclusively tailored to a specific model, the ALG-15 deploys based on size alone to give you a single option for all flashlights within a certain diameter range. Any flashlight with a head diameter less than 40mm around is applicable, while body diameters 22.6mm to 25.4mm are held snug by a non-slip rubber clamping pad that insulates light beams from the heavy shocks of long arm recoil. This rubber pad can be removed for greater compatibility range, gripping 25.4mm–26mm lights directly by the barrel to cast downrange illumination.