SF58 gauss rifle
Request was for a man-portable railgun firing tungsten rounds. I thought that meant a Mass Effect-style gun, but it turned out they had Starcraft in mind. It seems to have ended up as a combination of the two.
Top view is base weapon; rear magazine holds 50 saboted 8mm tungsten rounds, while the power cell in front of the trigger has enough juice for 500 shots. Laser rangefinder/designator is above the barrel, while the recoil compensating mechanism is below. www.mediafire.com/download.php?3mfy0h5a49z3j7j
Bottom view is "grenadier" config, with underslung missile launcher (grenades are so 20th century); 37mm beam-riding guided missile shown as well. www.mediafire.com/download.php?i39j628r9u9jsrk