Older weapons, like the battleships, which are now being retired, proved their utility, too.

The weapon would prove plenty big enough when he squeezed the trigger.

But by then, he warned, many weapons of the future may prove too costly to bear.

Their weapons proved useful, and Red King was soon out of rocks.

In close quarters the shorter weapons would prove more effective.

For all he knew, their weapons would prove completely impotent against it.

"The weapon, so far, has only proven itself in the closed confines of the tower!"

The weapons, however, apparently proved ineffective, for ships began to disappear.

In action, this weapon proved to be slow to operate.

If these weapons prove reliable and effective, the reputation of the contractors will benefit.