Concept Development Corporation Sitelite SL-500 Ultra Mag Green Laser Professional Boresighter VZSL500. Accurately boresights ALL rifles pistols and shotguns. Fits all calibers from .22 cal. to .50 cal. Plus 20 ga. and 12 ga. shotguns. No optional arbors required Now includes ballistic targeting system software which calculates and prints a calibrated laser boresighting target to your specific requirements Plus a laser line generator lens adaptor to project a laser line for precise scope leveling. Specifications for Concept Development Corporation Sitelite SL-500 Ultra Mag Green Laser Boresighter: Manufacturer: Concept Development Corporation Beam Color: Green Package Contents: Concept Development Corporation Sitelite SL-500 Ultra Mag Green Laser Boresighter Concept Development Corporation VZSL500: Sitelite SL-500 Ultra Mag Green Laser Professional Boresighter