The system's primary purpose is to defend against anti-ship missiles, unmanned aerial vehicles and other precision guided weapons.

It can also be employed against conventional and rotary-wing aircraft, surface ships, small water-crafts, coastal targets and floating mines.

Ammunition magazine and feed arrangements of the Twin Fast Forty remain the same as the Compact but operate at a higher speed.

[1][5] The mounting is currently marketed by S&T Dynamics as 40L/70K Nobong (노봉) and available with optional dual feed mechanism of 704 rounds magazine capacity.

[5][6] The OTO Marlin 40 is the single-barrel, light-weight and no-deck-penetration derivative of the DARDO family, succeeding the Single Fast Forty variant.