Assault marines are basic melee units with jump packs produced in Chapel-Barracks and are deployed through deep striking.
In Game Edit
Assault Marines are melee oriented, armed with a chainsword and bolt pistol. Assault Marines can also be upgraded with flamers which makes them good at breaking morale and weakening enemy troops. Assault Marines have jump packs which makes them fast and allows them to jump to different areas. This can make them good for scouting and ambushing as well as giving them a good escape should they be overwhelmed.
A good idea is to have them jump to, for example, an enemy tank. Jump them to the tank and have them throw a melta bomb or a krak grenade and then jump them out. Assault Marines can jump twice before the ability needs to recharge.