BY THE U.S. ARMY INFANTRY BOARD:
<p>American 180 Rifle System with Laser LOK Sight. Since the American 180 rifle system with laser LOK sight is currently being used by some law enforcement agencies, the feasibility of using the system for certain types of Special Forces missions is being evaluated by the U.S. Army Institute for Military Assistance. To obtain data for this evaluation, the Board compared the American 180 system with laser LOK sight and the standard rifle, 5.56mm, M16A1, that had a laser LOK sight attached below its barrel.
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The American 180 rifle system consists of a .22 caliber American 180 rifle and a laser LOK sight. The rifle fires the .22 caliber long rifle cartridge both semiautomatically and automatically (over 25 rounds per second), and is equipped with either a 16-inch or a 9-inch barrel. The laser LOK sight is a helium-neon gas laser that emits a red laser light
U.S. Army
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/imgsrv/download/pdf?id=mdp.39015084386609;orient=0;size=100;seq=457;num=7;attachment=0"><i>Infantry Magazine</i></a>, March-April 1978, Vol. 68, No. 2, Page 7