7.92x33mm kurz/ StG44 cartridge headstamp?

[Sunray]

Yep. 'WA' is Hugo Schneider A.-G., Werk Leipzig, Germany. The '44' is the year it was made. The 7.92 x 33 is the original assault rifle cartridge. The AK was basically copied from the Stg 44 too.
http://stevespages.com/jpg/cd792x33kurz.jpg
Headstamp Codes - International Ammunition Association

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[Eaglelord17]

Yep. 'WA' is Hugo Schneider A.-G., Werk Leipzig, Germany. The '44' is the year it was made. The 7.92 x 33 is the original assault rifle cartridge. The AK was basically copied from the Stg 44 too.

Not really the AK and STG-44 have nothing in common really other than being intermediate cartridge rifles. That is a old myth that has been going around for years along the same quality as the Soviets can use our 7.62 rounds in their AKs but we can't use their ammo in our FNs.