These are concepts for the "Black Age" table top wargame. these guns are going to be used mostly by the Confederate Marine Corps. They work by launching an small obsidian shaft or bolt at high speeds using a rail style lauch system. As the shaft leaves the rifle it coated with an energy "haze" that burns and destroys organic tissue. The rationale is that a smaller projectile will give it an increased chance of pentrating body armor while an actuall solid projectile will give it more stopping power than a laser.
the magazine is placed at the extreme rear of the rifle because, since it works on a rail launch system, there is no hammer mechanism needed to lauch the round.
the large smooth things on top of the rifles are heatsinks meant to cool the weapon.
the third rifle from the top is meant to be used by soldiers in battlesuits, so the trigger, grip and furiture are larger.
Other art pertaining to Confederate Marine Corps:
Mk5 era sniper rifle [link]
Mk5 era soft armor suit [link]
Mk5 era guns [link]
Mk5 era scout suit [link]
Mk4 era battle suit [link]
Mk4 era guns [link]
More Mk4 era guns [link]