i dont think that it would kill megatron in one hit......so if the recoil killed Boba, then megatron would win

(but wouldnt the kickback from the grenade launcher kill fett?)

what about his jetpack?

Megatron can fly as well, so even with his Jet pack I'd still say Boba wouldn't win.

There's no way that a Human, even one like Boba, can go up against a thirty foot tall alien robot and win. Especially one that's evil, hates Humans and doesn't care whether or not they live or die.

Not to sound completely biast, I'd give Boba a shot at Megs, but nothing more. He'd be crushed before he had that chance to fire off another shot.