If that isn't wild enough for you, here are two designs developed in the 1960s by a designer named G.A. Korobov; a three-barreled bullpup design known only as the "ZB Device", and then a further prototype of that rifle, with a .50-calibre grenade launcher under the 7.62mm barrels, known as the TKB-059; a 50 calibre projectile doesn't leave much room for a payload, but it might be just the thing for Aliens
looks like soemthing out of duke nukem 3d