Smooth bore, curved angle firing mortar with a 82mm M69 shell.

Mortar is used in the open area, trenches, rear slopes, elevations, depressions to eliminate personnel on the ground, open routes through barbed wire and silence the firearms, open routes through engineered barriers, designed to protect troops from enemy fire and surveillance, create smoke screens, and illuminate the area.

NSB-1 or NSB-3 sight device is used for firing. M57 60 mm fragmentation, M73P2 smoke screen, and M67 illumination projectile is used to fire from the mortar.

The NSB-3 is designed for 60mm M57 and 82mm M69A mortars.