Low-yield
Low-yield was a weapon's yield or energy output which was less powerful than other typical weapons. Variable yield weapons could be modified to have a low-yield.

During the early- to mid-22nd century, Earth Cargo Service freighters such as the  were commonly equipped with low-yield plasma cannons, often referred to as "pop-guns", designed only to break up asteroids and meteors. The captains of these freighters, however, would often upgrade the cannons for more powerful ones the first chance they got. ()

See also
Low-intensity burst
Directed energy weapons