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Photos of the Mag from Huk's Sportco 71A from the mid 70's. A pretty close match.
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Thanks everyone, Yes the left is higher than the right. Semi-auto Sportco.

It looks very similar in some images form uncle google. But I think it is a Sportco. When you look at the mag from the end (top) the front is round & the sides are flat, narrower than rounded front,...

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This could be it. The side of the mag is lower on the right and exposes more of the follower.
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Anybody know what this is out of. It's 22lr.
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