I hate to ask because I think I know the answer, but…
Are Pre Ban HK mags available for the USP Compact?
No, not unless there are some prototypes out there or
something, but that is a stretch, considering that the USPc
wasn't even introduced until well after the ban had already
passed into law.
How about the USP full size?
9mm and .40 = yes, not that hard to get, with the
exceptions of the extended jet funnel mags, which I
believe were introduced well after the ban.
.45 ACP = rare, but they do exist. This is the subject
of much debate, but I know for a fact some preban
mags were imported, because there were people selling
them during the ban. HK-USA denies this but everyone
with a clue knows better. (IMO, HK-USA just got irritated
that someone circumvented their supply chain by acquiring
mags from the mothership in germany, or one of its
distributors) .
I'll assume not for the new P2000 series.
USPc and P2000 mags are identical.
-Mike