I would use a grinder for that personally.
But would. Grinder give a consistent edge on 5 separate aluminium pieces?
Attached pic of profile.
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You can always clean up the cut edge with a file after. Not sure I would trust a jigsaw on that.
Flip it over and go through the back - the grinder basically wants to cut straight lines.
If you have access to a mitre saw, a multi blade would do that nicely.
You could build a chop saw jig for the grinder. Or just use an old blade on a chop saw / circular saw,
made me think of this
https://www.youtube.com/watch?v=LV6OSGKkQAY
@Acliff started
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I would use a grinder for that personally.