The APL Compact is a brand new INFORCE product providing 200 Lumens of vibrant white light with up to 1.5 hours of runtime. Ultra-light and durable inside and out, weighing less than 2 ounces, it provides a high-intensity tight beam to fill your field of view for close to mid-range target identification. The water-resistant, glass reinforced polymer body is incredibly powerful and ultra-compact. Extensively tested, it mounts completely flush with the muzzle of a Glock 19 and offers constant and momentary operating modes. Textured paddles for a non-slip grip and ambidextrous on/off switches enable left or right hand activation. In addition, the easy-to-operate lockout system ensures the light isn?t activated until you?re ready. Compatible with the Glock 17, 17L, 19, 20, 21, 22, 23, 24, 30, 31, 32, 34, 35, 37, 38, 40, 41 - This light will sit flush with the Glock 19 Barrel. FUNCTIONS: Constant / Momentary LOCKOUT SYSTEMS: Head Rotation OUTPUT: 200 Lumens MODE: White WEIGHT: 1.87 ounce/53.2 gram with battery MOUNT: Integrates with all Glock rails. SIZE: Length: 2.43 inch/6.2 centimeter Width: 1.17 inch/3.0 centimeter Bezel Diameter: 0.88 inch/2.2 centimeter CONSTRUCTION: Glass reinforced polymer body offers high-impact resistance and durability. RUNTIME: High efficiency LED provides up to 1½ hours ACTIVATION: Ambidextrous on/off BATTERY: 1 Lithium CR2 included. Head removes for battery replacement..