The weapon consists of two stabilized NN-30 30 mm water-cooled four chamber revolver cannons, which are mounted inside a riveted steel turret.

The guns each have a rate of fire of 1,000 round per minute; they are fed by independent 500-round belts of ammunition.

[2][3] The rounds are electrically fired; propellent gases are used to eject the spent shells and belt links into a space between the magazine and the hull.

The weapon is remote-directed, typically by a fire-control system linked to either a MR-104 Rys (NATO reporting name: Drum Tilt) or MR-103 Bars (NATO reporting name: Muff Cobb) radar systems.

The Chinese Type 69 fires only a locally produced version of the high-explosive round.