From a 20mm AA- Gun training range

[munfrosch]

Not perfekt but 100% no Fake!

 

[hicky1300]

If these are all 20mm I`d say far right 20mm oerlikon or Hispano? As to others, as no idea as to range location, age & users WWII German experimental or post war Vulcan??
Interesting assortment though.
What did you clean them in? Vinegar, coke or what?

 

[munfrosch]

20mm AA-Gun range from the germans. range was used from 1936-45. some maybe experimental

cleaned oxalic acid for alu and electolysis for the steel parts

from left to right

2x pzgr40 b (practice, only steel)
3x pzgr40 (alu with core)
1x cored but somethings other then pzgr40, maybe experimental
1x full alu, maybe training, maybe experiemental?!

 

[hicky1300]

Cheers for info Munfrosch
Interesting that the 5th from left has such deep rifling over its length.
Also the use of Alu?
Still think the far right looks very Oerlikon/Hispano
Any chance of dimensions please?

 

[munfrosch]

tomorrow i could take the measures. but 100% german ww2 for 20mm Flak. i think the barrel was shot out