Everybody knew Rex as an unhappy anti-social teenager. Nobody guessed what he would do when he grew up though. Rex spent long nights working on a scorpion suit, that he would eventually use to help publicize his manifesto.

Strength

Pincers can break through doors and locks. They can also move fast enough to catch bullets.
Stinger shoots out tranquilizer darts, can also be used in close-quarters as a melee weapon.

Strength Source
Scorpion suit.