Very hard to find discontinued laser max USA DESIGNED & ASSEMBLED???????????? UNI green rail, mounted laser with oversized ambidextrous left and right switch for gloved hands can be set for steady or pulsed beam also has stackable rail interface so you can hook up an auxiliary light at the bottom of the laser if you desire fits rifles, shotguns and handguns or tactical style rifles (anything with a picatinny weaver style rail) I will include four batteries, so two sets in total one that has been installed but very very lightly used and a brand new set along with the Allen key to adjust windage and elevation so you can zero the beam to your desired setup if you have any questions or concerns, feel free to message me I will get back to you as promptly as I can. Thank you for looking. Have a nice day.