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Naval guns1971–present
Naval artillery
Bofors 57 mm Naval Automatic Gun L/70 is a naval artillery originating in Sweden. It was built by Bofors Defence (1970–2000) United Defense (2000–2005) BAE Systems AB (2005 onwards). Reported operators include Bangladesh, Croatia, Finland, Indonesia, Ireland, Malaysia, Montenegro, Singapore, Sweden, Thailand, West Germany, Canada, Brunei, Germany, Mexico, Norway, United Kingdom, United States.
SwedenBofors 57 mm family — Mk 110 aboard USS Freedom — licensed photograph
United States Navy, Lt. Ed Early · Public domain · Resized · Public domain · Source ↗ · ModifiedNaval artillery
Sweden
1971–present
See users
Bofors Defence
Mark 1: 1970 Mark 2: 1981 Mark 3: 1995
Bofors Defence (1970–2000) United Defense (2000–2005) BAE Systems AB (2005 onwards)
Mark 1: 1970 Mark 2: 1985 Mark 3: 2000
See variants
Mark 3: 14,000 kg (31,000 lb ) (weight including 1,000 rounds onboard, each weighing 6.5 kg (14 lb) per complete round)
Bore length: 3,990 mm (157.09 in) Without flash hider: 4,045 mm (159.25 in) With flash hider: 4,345 mm (171.06 in)
57 × 438 mm R (m/70) 6.1 kg (13 lb ) complete round 2.4 kg (5.3 lb ) pre-fragmented shell
57 mm/70 caliber
Single barrel (progressive RH parabolic twist, 24 grooves)
Electronic firing
Mark 1: −10°/+78° (40°/s) Mark 2: −10°/+75° (40°/s) Mark 3: −10°/+77° (44°/s)
Full 360°: Mark 1: 55°/s Mark 2: 55°/s Mark 3: 57°/s
Mark 1: 200 rounds/min Mark 2: 220 rounds/min Mark 3: 220 rounds/min
1,035 m/s (3,400 ft/s) (HE round)
8,500 m (9,300 yd) (HE round)
17,000 m (19,000 yd) (HE round at 45°)
Magazine : Mark 1: 40 ready rounds, 128 rounds in ready racks in mount Mark 2: 120 ready rounds, up to 40 rounds in dual hoists Mark 3: 120 ready rounds, up to 40 rounds in dual hoists, 1,000 rounds in mounting
Gyro-stabilized in local control.
Bangladesh :
Croatia :
Finland :
Indonesia :
Ireland
Malaysia :
Montenegro :
Singapore :
Sweden
Thailand
West Germany :
Canada :
Brunei :
Germany :
Mexico :
Norway : NoCGV Svalbard
United Kingdom Type 31 (under construction)
United States
Reference text from Wikipedia contributors, used under CC BY-SA 4.0.
Points represent sourced observations, including revisions. Revisions on the same effective date are not separate inventory events. Ranges appear in the table and are not plotted as exact points.
| Observation / report period | Value | Source | Claim state |
|---|---|---|---|
| 1 Oct 2026 | 4.345 m | Wikipedia contributors | superseded |
| 1 Oct 2026 | 4.345 m | Wikipedia contributors | superseded |
| 1 Oct 2026 | 4.345 m | Wikipedia contributors | approved |
Bofors 57 mm Naval Automatic Gun L/70 equipment records. Variants, orders and quantities are shown as reported in each inventory source; coverage is incomplete.
Bangladesh
Brunei
Canada
Croatia
FinlandReported count for Bofors 57 Mk 1 / Bofors 57 Mk 3. Service scope: Finnish Navy; does not replace a national total. 2 distinct count cell(s) from the same source list; shared rowspan cells counted once. Retired, wholly reserve and on-order rows are excluded; the reported count retains any explicitly mixed stock scope in the quoted row. Count column(s): quantity: 2 (1 × per ship) / quantity: 4 (1 × per ship). Origin: Sweden. The listed variants/roles are the scope, not an immediately deployable count. The components do not establish one inventory census date; the stored date is the retrieved source snapshot.
Germany
Indonesia
Ireland
Malaysia
Mexico
Montenegro
Norway
Singapore SwedenReported count for Bofors 57 Mk3 / Bofors 57 Mk3b. Service scope: Swedish Navy; does not replace a national total. 2 distinct count cell(s) from the same source list; shared rowspan cells counted once. Retired, wholly reserve and on-order rows are excluded; the reported count retains any explicitly mixed stock scope in the quoted row. Count column(s): quantity: 5 (1 × per ship) / quantity: 4 (1 × per ship). Origin: Sweden. The listed variants/roles are the scope, not an immediately deployable count. The components do not establish one inventory census date; the stored date is the retrieved source snapshot.
Thailand
United Kingdom
United StatesBangladesh, Croatia, Finland, Indonesia, Ireland, Malaysia, Montenegro, Singapore, Sweden, Thailand, West Germany, Canada, Brunei, Germany, Mexico, Norway, United Kingdom, United States
Equipment reference ↗