It looks like they got the joint too hot & burnt the flux causing a weak joint. More that likely the repoductions were all soft soldered. And the reason we haven't seen more failures is most are shot very little, if at all. I've had 9 repo's over the years & most only had a few boxes shot through them, & then into the safe they go & a few were never shot at all. Most that come up for sale look like they have never been shot. So, this is probably why we haven't seen many failures.
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