a bolter which is a gun that shoots rounds the size of a coke can that explodes inside te target.there is a pistol and a heavy varient. also plasma guns in the same varients. a flamer, self explanetory. and a melta, it shoots hot compressed air. lass cannons that are like gint lasers. and terminaters use storm bolters a cross between a heaavy bolter and a normal boloter. a space marine will also use mele weapons. chainswords, power axes, power swords, lightning claws, power fists, thunder hammers and chain fists.