Yes it is a mauser anti tank rifle.
What’s it called?
Mauser 1918 T Gerwehr?
Winner winner, chicken dinner! As my kids would say.
Semi auto .22 should be easy.
Is it Australian made?
Not Australian.
Looks like a Stirling. 22.
But it isn’t.
Is it a Mauser .22LR 105?
No its not.
Is it a Wards Western Field - Model 87-SB
No it is not.
It does use a 10 round detachable magazine that’s not fitted in the photos.
Would be a heap of fun, not sure how you would put it in a safe though lol
Not American, French, German or Italian either.
Belgian?
Not Belgian, Dutch, Austrian or Swedish.
Gevarm - Carbine Automatique French .22LR Semi-Auto