Bofors 25 mm M/32

Anti-aircraft gun

The Bofors 25:mm M/32 was a Swedish designed and built light anti-aircraft gun that was used aboard ships of the Swedish Navy during the Second World War.



The development of Bofors first automatic weapons began in 1925 when the Navy requested the development of a 20:mm anti-aircraft gun. In 1928 the Navy requested a new 40 mm AA gun and a 25:mm AA gun which was produced in parallel and known as the M/32.


A twin M/32 mount aboard HSwMS Gävle

The M/32 was designed with a barrel 64 calibers in length, fired a 25×205:mmR cartridge, at 160–180 rpm and with a muzzle velocity of 850:m/s. Later a shorter version firing a 25×187:mmR cartridge was produced in limited numbers. The M/32 looked similar to its larger 40:mm sibling and used the same long-recoil operating system and hydro-spring recoil mechanism. Its feed mechanism consisted of 6-round clips which were held in a vertical frame above the gun breech. Two clips were mounted side by side so that continuous fire could be maintained without the need to pause and change magazines. The clips were in two halves, which split and fell away as the cartridges entered the frames.

The gun was available in fixed single mount, fixed twin mount or on a mobile four-wheeled carriage with twin collapsible outriggers. In addition to fixed pedestal mounts, a retractable gun mount was designed for submarine use. Although available in land mounts it was primarily a naval weapon. At first the 40:mm gun was considered to be too heavy, so preference was given to single and twin mounts of the M/32 aboard ships of the Swedish navy.


  • A single M/32 mount aboard HSwMS Malmö

  • A single M/32 mount at Vaxholm Fortress, Sweden.

  • A twin M/32 at Vaxholm Fortress, Sweden.

  • A twin M/32 at Vaxholm Fortress, Sweden.

See also


  1. ^ a b "21-29 MM CALIBRE CARTRIDGES". Retrieved 2017-09-20.
  2. ^ a b c d e "BOFORS AUTOMATIC CANNON". Retrieved 2017-09-20.
  3. ^ "Swedish guns". Retrieved 2017-09-20.


  • Gander, T 1990, The 40mm Bofors Gun, 2nd edn, Patrick Stephens, Wellingborough, Eng.

External links

This article is copied from an article on Wikipedia® - the free encyclopedia created and edited by its online user community. This article is distributed under the terms of GNU Free Documentation License.