Rocket Salvage

Primo Rocket is a down-on-his-luck rocket racer, with
two "kids" (one turns out to be his clone, another turns out to be . . . well
that would give too much away) who finds himself mixed up in an intergalactic
search for a rumored "ultimate weapon." Backwater gangsters, mad scientists, and
two antagonistic governments end up in an epic showdown, and it turns out it's
Primo's job to save the world.