Work on light mortars began in Poland in the early 1990s and was carried out in parallel by Huta Stalowa Wola together with the Military Institute of Armament Technology and the Research and Development Centre for Mechanical Equipment (OBR SM) in Tarnów.

The mortar from Tarnów was qualified for serial production and in 1998 the army ordered an implementation batch of 6 LM-60D and 3 LM-60K.

On August 2, 2000, by order of the Chief of General Staff, the LM-60D/K mortar was accepted into the equipment of the Polish Armed Forces.

Among other things, they have entered the armament of mortar teams in motorized platoons on Rosomak wheeled infantry fighting vehicles.

Aiming is carried out "by hand" - the direction is set by aligning the barrel axis with the target, while elevation is operated using a gravity sight - this allows for shooting on flat trajectories.