(1) In especially serious cases of section 125(1) the penalty shall be imprisonment from six months to ten years. An especially serious case typically occurs if the offender

1.  carries a firearm;

2.  carries another weapon or another dangerous instrument for the purpose of using them during the commission of the offence;

3.  through violence places another in danger of death or serious injury or

4.  commits plunder or causes significant damage to the property of another.