Bofors 40 mm gun
The Bofors 40 mm gun is a famous anti-aircraft autocannon designed by the Swedish firm of Bofors.
Lock of the Polish-made Bofors 40 mm gun, discovered after the war somewhere in Warsaw (hence the colour of oxidised steel), Muzeum Wojska Polskiego
Bofors in Saint Petersburg Artillery museum, Russia.
40 mm ammunition on HMCS Haida