Speed Force bazooka

The Speed Force bazooka, coined by H.R. Wells, was a weapon developed by Tracy Brand. Its purpose was to be used to trap the speedster Savitar in the Speed Force.

History
Barry Allen knew from traveling to the future that Tracy Brand would build the trap that would trap Savitar in the Speed Force in four years. However, in order to save Iris West, he appealed to Tracy to build the trap in the present. Tracy was able to develop it but in order for it to work it needed a powersource that was stronger than the sun. They found a suitable powersource in a piece of Dominator tech and fitted it into the bazooka. Barry then used it on Savitar but he revealed that he was able to render it useless with the Philosopher's Stone.

In the original timeline, Tracy Brand developed the trap about four years after Savitar had killed Iris West. Barry had used it to successfully trap Savitar in the Speed Force.