The Best Gun during WWII was the legendary FLAK 88 in Germany.
It was the nightmare of Allied Bombers, Fighter planes and tanks.
The 8.8 cm FLAK ( i.e. Flugabwehrkanone) with it's powerful 20 lbs shell
could destroy Airplanes at an altitude of 26,000 ft plus. Amazing.
When the war ended most German weaponry was destroyed by the Allies.
Now one of the soldiers, who was working on the site of those demolitions,
made a war souvenir from a cross-cut section of the barrel of a destroyed 88.
Done in 1946 in Heidenheim / Southern Germany he put all the info on HIS souvenir.