Help Me Make This Concept Work

Hello, all. I have a character concept I'd like to utilize for an upcoming game.

The legal sources are: CRB, APG, ACG, ARG, UC, UM, UE, Occult Adventures, and Unchained.

The legal Races are: Human, Half-elf, Halfling, Ratfolk, Catfolk, and Tengu.

The concept is a guy who ties bombs to his big weapon and swings it at his enemies. The Grenadier would be the perfect answer to this, but it's not from one of the legal sources. Can anyone help me find an alternate route? We're starting at level 3.

Thanks!

Elemental Annihilator Keneticist sort of works, with his melee blasts re-flavored to be bombs + weapon.

You can specialize in the Syringe Spear and load it with alchemist's fire and other exciting fluids (Extract of Skin Send :D).

Good ole Shocking Grasp Magus wielding a Dwarven Waraxe or Bastard Sword.

You could put ranks in craft- improvised weapons, take catch off guard, eventually add quick draw, improvised weapon mastery, and possibly the fragile weapon feats too..

Build your own weapon-like objects with alchemical booms attached, draw another when that one explodes..

Empty Hand Monk, Feral Gnasher Barbarian, or maybe Cad Fighter come to mind for this.. It would be nice to add enhancement bonus too, though, so maybe magus, or even warpriest if GM allows weapon focus - improvised weapons..

I agree with going kineticist with kinetic blade, throw on some gauntlets and act like they're covered in gunpowder or something, each blow sets it off, and now you're doing fire damage per hit with a mini explosion, seems pretty fun.

Kineticist might actually work, thank you!