A rock was certainly a useful weapon when utilized correctly.

Common sense suggests that this is no time to abandon a useful weapon in the fight on crime.

A good sword stick is a very useful weapon, though.

It didn't seem a very useful weapon at the moment.

As a useful weapon it has value only if its limitations are known and allowed for.

And he had found a knife for him- self, which might prove a more useful weapon.

It seemed a perfectly normal thing to him that somebody would want such a useful weapon.

Leaving a trail anyone could follow and carrying no useful weapon at all.

Had this man ever seen her as more than a useful weapon?

I understand it is a useful weapon when arguments get ugly.