The Thundergun. Also called the Wunderwaffe DG-3.
This weapon is the best weapon of all time, no contest.
It shoots a compressed air shock-wave blast which is stored in special magazines designed for it.
Any close range/direct hit from this bad boy is a guaranteed one-shot kill.
Anything that isn't killed by the first shot is blown off it's feet, left open for another kill-shot.
Each mag has two shots, indicated by the glowing red lights just before the barrel.
When both shots are fired, the Thundergun automatically ejects the ammo cartridge, leaving the slot open until you replace it.
This ease of use and deadly firepower make the Thundergun the greatest weapon ever invented.
Credit to this masterpiece goes to Dr. Maxis and Dr. Richtofen.