The Shobbel-1 Artillery Shell Launcher was developed in response to the "Watchers" landing and the ones that are advancing on our territory, as mortars and conventional artillery became too much of a hassle and too slow to actually be effective on frontlines, and thus this weapon was developed. It propels the 75 MM artillery shell by using a mixture of gas propellant and springs, which is stored in the tank on the back and the metal under section in the front of the gun.
Fat man launcher from fallout uhhh ig me i sense a trend of me being inspired by fallout weapons