Cannon God: Exaxxion #4

Aliens colonize Earth using amazing nanotechnology and a giant robot! Worse yet, the only hope for Earth's survival is a teen boy with an attitude and his mad-scientist grandfather. But gramps produces an impregnable gun-suit and a well-endowed android assistant for the teen and the fight is on! However, a little fight adds up to a lot of destruction. Heck, the muzzle blast from the gargantuan robot's gun is enough to wreak havoc, but what happens when that bullet hits its target? Sayonara, Mt. Fuji!