Jack arrives and kills the alien with a more powerful gun.

He tried to get away, but he didn't have a chance against such a powerful gun.

While not the most powerful gun in the world, it is compact and reliable.

At a little over three feet in length, the powerful gun looked intimidating.

Most tanks have a powerful gun and one or more machine guns.

They also made the Jet, a smaller and less powerful gun intended for small children.

And why so many shots from that great powerful gun?

These were powerful guns able to fire a 500 lb shell into London every minute.

About the same time the radio and a much more powerful gun were introduced.

They had walked into a close-range attack from two powerful guns.