1.4 FD Laser Cannon

The 1.4 FD P-Tower, also known simply as a P-Tower was a light fixed anti-vehicle weapon emplacement manufactured by the Atgar SpaceDefense Corporation. It held enough power to disable an AT-ST, and its rugged dependability meant it could function even in the harshest environments.

from – https://starwars.fandom.com/wiki/1.4_FD_P-Tower