I wear a belt when I need additional weights. Otherwise my "integrated weights" are my steel doubles and stainless steel backplate.
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Asking this of a scuba diver is somewhat redundant, don't you think?
One of my buddies has a great saying. He likes Hitler more than weight-integrated BCs. He lifted another buddy's BC and tank and almost threw out his back.
I've seen weight pockets fall out of BCs a few times.