Rule 34 Dev - bad_id bad_pixiv_id battle black_tri-stars derivative_work explosion firing gun gundam i.t.o_daynamics m1_bazooka machine_gun mecha mobile_suit_gundam realistic robot rocket_launcher science_fiction shell_casing space spacecraft weapon zaku zaku_ii zaku_ii_hmt_black_tri-stars_custom zero_gravity|8452043847