my EDC - 43X MOS, HS507K on a C&H plate, smooth face trigger, mid weight striker spring, $0.25 trigger job and Shield 3 mag and steel mag release combo.
quite counting after 5000 flawless rounds, mostly European manufactured 124 gr. ball, hand loads and a couple different defense loads (currently stoked with Federal Punch 124 gr. JHP).
when I first assembled my EDC package I did a "burn down", 500 rounds hot, fast and dirty in two days, once it made it thru that without a hick up I figured making it thru the 45 rounds I carry with it cleaned and properly lube wasn't gonna be a problem.