Good to know.
For better or worse, why bother to. It seems to me the US market version has better trigger feel in both DA and SA. Could be just me.
BTW, I loaded some primer only rounds to test for primer strike; CCI500 (small pistol), CCI400 (small rifle primer), all ignited with #16 hammer spring with and without the use of CGW reduced firing pin spring. No ignition using CCI #450 small rifle magnum primer even with OEM hammer spring. I don't have extended firing pin.
Edited:
Forgot to mention, tested in DA mode only since SA has stronger strike with hammer cocked back more similar to revolvers.