Well, that picture solves the earlier question about whether it's straight or delayed blowback. It clearly doesn't have the A17 (and presumably A22 Magnum) locking mechanism on the top surface of the bolt.
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I came to the same conclusion after looking at the manual https://s3.amazonaws.com/savagefiles/manuals/manual_a22_22lr.pdf
I was considering it, but am now going to give it a pass.