I don't know about weak. I wouldn't call it weak.
I certainly wouldn't call it a detent. It has the axis lock which is more dynamic than a blade held with a tiny ball detent meaning the omega springs and axis lock will pull the blade into the knife from quite a ways out from the handle. Much further from the handle than even a compression lock. My point is even if the blade some how opened a bit it would very likely be immediately pulled back into the handle.
I took these photos of another Axis lock comparing it to the compression lock. Look how far the blade can be open and still have it quickly drawn back into the handle. The Mini is similar.
There may still be a problem but I'm just saying . . .
From this far out the axis lock will still draw the blade into the handle when I release the axis
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In contrast the compression needs the blade this close into handle before it will draw the blade in the rest of the way.
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At this point the axis lock can no longer pull the blade in
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T this point the compression lock can no long pull the blade into the handle.
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