And when the BC comes out, trade your BB? These aren't cars. The only upgrade that I'm aware of is the detent on the V1's. When I sent my HK45c back for a hammer issue they upgraded my detent plate. If I hadn't read the return invoice I would have been unaware of a detent upgrade. I doubt that any of us shoot enough or place enough stress on the platform to worry about the minor tweaks made during the product lifecycle to justify an upgrade.So I have a random question. Does HK ever change parts or upgrade things on a newer the pistol in the same line? I have a AK date stamped HK45c... I was wondering if there would be a difference or reason to get the newest BB date code HK45c. Any ideas?