A community to share and appreciate your favorite designs from throughout fiction. If you really hated or really loved it, put it here - whether it's a character, weapon, environment, I don't care.
Reinhardt (Overwatch)
King Dedede (Kirby)
Barrel (Amphibia)
Would Gypsy Danger's rocket punch count as a weapon?
Yeah, I love it when fists do this too! Iron Man and Baymax come to mind.
Can’t forget the one in Alita: Battle Angel as well.
Wyvern ignition!
What about fists?
Nora Valkyrie doesn't have thrusters, just explosive rounds for propulsion but feels similar enough. 
There's a handful of weapons like this in Gundam Iron Blooded Orphans. Mostly axes and cleavers with thrusters for extra kick.
It hasn’t come out yet but does Dylan from control resonant count? There aren’t thrusters but his hammer definitely looks like it’s charging up power before he swings