Reputedly, HK P7s were said to be the popular sidearm of choice for Hollywood's Action-Movie terrorists back in the '80s.
Myself, personally, I don't see the allure.
Yeah, it's got an interesting look, ... but beyond that, the gun is needless weighty relative to caliber, sports low magazine capacity (8+1), and is blessed with a not-so-intuitive manual-of-arms based on an awkward decocking mechanism.
Worse, it's chambered for the mostly anemic 9mm.
Sure, for executing dissidents and hostages with point-blank head shots, a P7 will work well enough, but in a stand-up fight against a determined adversary armed with something modern like, say, a .45acp Glock 21, ... forgettaboutit.