| 57 mm kanon M/89B | |
| Origin: | Sweden |
| Type: | Naval gun |
| Is Ranged: | YES |
| Is Artillery: | YES |
| Manufacturer: | Finnspong, Stockholm Vapenfabrik, Bofors |
| Variants: | M/89, M/92 |
| Weight: | 380kg (840lb) |
| Part Length: | (L/50) |
| Velocity: | 856m/s |
The 57 mm kanon M/89B was a Swedish naval gun deployed aboard early destroyers as their secondary armament.
The M89 gun had a shorter 45-caliber barrel that gave the gun a muzzle velocity of and a weight of .