"But we've got an ion cannon in perfect working order."

They fired just as the ion cannon hit them.

The new weapons systems would be online within a week, and the old ion cannons were still in place.

The ion cannon was at the ready; he would not miss if they turned to flee.

Far from being frightened, he itched to feel the weight of an ion cannon in his arms.

One of the Khagggun fired his ion cannon without effect.

"The ion cannons should be in the locker just where you are standing."

The first of the ion cannons erupted behind her as she reached him.

In science fiction, an ion cannon is a beam weapon.

One of them destroys the ion cannon before the crew can open fire.