The NcSTAR TLZ20G 20 Gauge Aluminum Red Laser Zeroing Bore Sighter is an essential accessory for precision-focused shotgun users. This laser sighting device enhances your shooting accuracy, making it easier to hit your targets consistently. Engineered for 20g shotguns, it features a powerful red laser that simplifies the zeroing process. The lightweight aluminum body offers durability without hindering mobility, making it ideal for both indoor and outdoor use. 20 Gauge Shotgun Laser Bore Cartridge - Fits 20 Gauge Shotguns Red Laser: 635-655nm, Max output