1. Things are bad enough without our guns shelling us.
2. Things are not bad enough without our guns shelling us.
3. Things are not bad enough with our guns shelling us.
Question:
Which is/grammatically correct?
What is the respective different meaning between them?

Question

1. Things are bad enough without our guns shelling us.
2.  Things are not bad enough without our guns shelling us.
3.  Things are not bad enough with our guns shelling us.
Question: 
Which is/grammatically correct?
What is the respective different meaning between them?

Answer

They're all grammatically correct, but the last two don't make sense. The first one means it would be even worse if our guns were shelling us.