All my CZ triggers are stock. I have 2 Omegas and 3 standard trigger CZs., including a P-01 of each variety. Personally, I prefer the Omega trigger, but only because the flatter trigger is more comfortable to me. After about 250 rounds with the standard trigger in a range session, I'm done. However, I can shoot the Omega triggers well beyond 300 rounds without any discomfort. Pretty sure both trigger types can be upgraded.