percussion cap

The revolver of the Civil War was, of course, a percussion-cap weapon.

He started running over, in his mind, the paratemporal areas in which gunpowder but not the percussion-cap was known.

On so slight an incident—the defect of a percussion-cap—did the battle hinge.

First of all—above and beyond everything else in a boy's sight—was the voyageur's percussion-cap rifle.