It uses a high strength stainless steel cylinder to control the power of the .38 Special +P round, and an ultralight J frame made from an alloy which supports the high-power rounds but alleviates the burden of heavier materials.
The S333 Thunderstruck™ sets the standard for the ultimate in personal protection by simultaneously firing two rounds of .22 Win Mag with each pull of the trigger. With four pulls of the trigger, eight rounds are fired in only three seconds.