Rule 34 Dev - 2boys alien arbiter armor back-to-back battle_rifle br55 bullpup gloves green_helmet greyscale gun halo_(series) halo_3 helmet highres holding holding_gun holding_weapon jafet_meza male_focus master_chief monochrome multiple_boys open_mouth power_armor rifle scene_reference spartan_(halo) thel'vadam twitter_username weapon|23906195352