Nightstick Full Size Long Gun Light Kit 1100 Lumens Black. 3 in (135 mm) Width: 0.9 in (23 mm) Weight: 6.3 oz (179 g) Diameter: 0.9 in (23 mm) Head Diameter: 1.4 in (36 mm) Light Source: LED Body Color: Black Quantity of Batteries: 2 Power Source: CR123 Warranty: Limited Lifetime Specifications for Nightstick Full Size Long Gun Light Kit: Manufacturer: Nightstick Light Output: 1100 lumens Bulb Type: LED Battery Type: Lithium CR123 Beam Color: White Color: Black Gun Model: M4 AR-15 Length: 5.3 in Weight: 6.3 oz Weather Resistance: Waterproof Dustproof Gun Type: Rifle Mount Type: Picatinny Light Source: LED Attachment Type: Picatinny Features of Nightstick Full Size Long Gun Light Kit LED technology Remote Pressure Switches Momentary or constant-on function Standard and offset Picatinny rail mounts Sharp focused beam for distance illumination Aircraft-grade 6061-T6 aluminum housing w/Type III hard-anodized finish Beam distance rated at 300 meters IP-X7 Waterproof Impact and chemical resistant Serialized for personal identification (2) CR123 batteries (included) Limited Lifetime Warranty Package Contents: Nightstick Full Size Long Gun Light Kit Nightstick LGL-160: Full Size Long Gun Light Kit 1100 Lumens Black