The V2 is the heavy LEM. When I started with CBP, we were issued the .40 version. Very good gun, well underrated. Pretty much a modern USP Compact, but fussier trigger that really can’t be converted (you either get a DA/SA or LEM… can’t really convert across them). But you get the backstraps and a usable rail. Never had an issue, but it was unfortunately scrapped with about 2,000 rounds thru it. Would have bought it back without hesitation. We switched to Glock 19s, which I will buy back when it comes up.
It’s a good gun. I bought one (.40, since I have a lot of magazines/ammo) last year for like $500. Changed the springs out to V1 (light LEM), did the extended magazine release and got a .357 SIG barrel. I bought it because I carried one… nothing other than that.
If you want a hammer fired polymer gun, I would spend your money on something else… Beretta PX4 works. The biggest issue with H&K is the costs. Is it a good gun? Definitely, but I view there are better values out there.