I'm willing to bet that you can cut the lock ring off and it won't make any difference. I bet it's locked on due to carbon build up.
Before you try cutting or ruining anything get some carbon cutter, it's sold under a few different names.
The jar I have has a milky white liquid in it and all you do is soak the piece you want cleaned in it and it loosens the carbon so it can be cleaned off. It doesn't work as well as they advertise but it does help. It might be worth the effort before you ruin something.
YMMV
Before you try cutting or ruining anything get some carbon cutter, it's sold under a few different names.
The jar I have has a milky white liquid in it and all you do is soak the piece you want cleaned in it and it loosens the carbon so it can be cleaned off. It doesn't work as well as they advertise but it does help. It might be worth the effort before you ruin something.
YMMV