Higoo&reg; All in One .22 to .50 Caliber Rifle Gauge Boresight Green Dot Laser Boresighter Powerful green laser boresighter, much more brightness, far range and durable quality than those red laser boresighter. Universal Laser Boresighter with Quick Push Button Activation Allows for Quickly and Accurately Resetting of Any Sights (Iron, Optical, Laser, Holographic, Etc) Easy to Mount On Any .22 - .50 Caliber Rifle or Pistol Comes with Tools, Four Adapters, and Batteries