Beileshi All in One .22 to .50 Caliber Rifle Gauge Red Dot Laser Bore Sighter Boresight Universal Laser Bore sighter 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 Premium Case Included.