A sniper rifle firing the .338 Lapua Magnum round (not .50 caliber, Cherokee Jack, you idiot). The most powerful weapon in the popular game, Counter Strike, which is a favorite of infantile morons and people who would thank themselves for graduating to Day of Defeat
A German railway cannon used during World War II. The Dora cannon had a bore of 800mm and fired high explosive shells that were disigned to penetrate several meters deep into any surface. This cannon was cabable of knocking out ammunition storage areas deep under ground. This cannon was so large that it had to run on two sets of tracks, and it could only be turned when there was a turn in the tracks (the gun did not have a turret or similar device). The Dora cannon no longer exists. When the Allies found it, it was in pieces.
The only good that came from Hitler's reich was a multitude of awesome weapons, one being the Dora cannon.