CVLIFE Laser Bore Sighter with ON/OFF Function

About CVLIFE Laser Bore Sighter with ON/OFF Function 【ON/OFF Switch】The CVLIFE .17hmr/.177Cal laser bore sight is equipped with an ON/OFF switch, making it easier to use. No need to remove the batteries every time, saving much time. 【Easy to Use】The .17 end barrel laser bore sighter is designed for ultimate convenience with its plug-and-play functionality, helping you get your aim close efficiently. 【Extra Battery and O-Ring Supply】Comes with 4 sets of batteries (12 LR41 batteries in total), each providing up to 90 minutes of laser operation. Includes plenty of spare O-rings for replacements and a sturdy metal case for storage. 【High Accuracy】Calibrated at the factory, requiring no further adjustments. Made of premium brass with sturdy construction, offering better performance in temperature resistance and accuracy. 【Specification】Designed to fit .17HMR, .177Cal specific calibers. Just insert the bore sighter into the barrel (without si-lencer) directly, easy to use and quickly gets t