You know how you deal with a fixed position?  Full automatic fire surpression to keep their heads down (which the armsmen can accomplish with their autoguns...) A few grenades tossed behind their barricades, and heavy armor piercing weapons shooting at any heads that pop up.  (the PC's have quite a few among them) and then, only moments later, first one, then a second Sentinel will come up with multilasers and will reduce the mutant's cover (and the mutants) to individual bits and pieces.<br/><br/>Not that cutting through a bulkhead isn't an option, but it's likely to take quite a lot longer, especially enough to make a sizeable enough hole.  The bulkhead is very likely to be a LOT tougher to destroy then the Mutant's barricade.