The Bandkanon 1, (meaning ‘tracked cannon 1’), is the primary Swedish self-propelled 155mm cannon. Its chassis was based on a lengthened Stridsvagn 103 S-Tank with one extra road wheel and armed with the Bofors 155mm L/60 automatic-cannon. This weapon has an exceptionally high rate of fire, being able to fire 14 shells in less than 45 seconds. With one round already loaded in the gun beside the two seven-round clips in the magazine. The magazine could then be reloaded with a built-in hoist in about two minutes.