The SL-500 Ultra-Mag Laser Boresighter features an ultra-bright XP daylight green laser with long-life lithium battery for accurate boresighting of all rifles pistols and shotguns.SL-500 Ultra-Mag Laser BoresighterUltra-bright XP daylight green laser technologyUniversal fit for all calibers from .22 cal to .50 calCompatible with 20 ga and 12 ga shotgunsNo optional arbors requiredIncludes ballistic targeting system softwareLaser line generator lens adapter for scope levelingLong-life lithium battery includedComplete boresighting solution with advanced ballistic software that calculates and prints calibrated targets to your specific requirements plus precision scope reticle leveling capabilities.