40-mm L/70 naval gun

The Swedish 40-mm L/70 anti-aircraft gun is the successor to the 40-mm L/60, which was mass-produced for many Allied forces in World War II. The two guns are similar, but the L/70 has a higher rate of fire, higher muzzle velocity, faster elevation and traverse, and more sophisticated fire control.

The L/70 's rate of fire has been increased over the L/60 by overlapping phases of the firing cycle, with empty shells being ejected near the end of the recoil and a new round being...