USPSA and IDPA don't play by IPSC rules.
IPSC Production has a minimum 5 lb DA trigger pull.
With a CZ only the first shot is DA, the rest are SA as light as you like.
With a Glock, all trigger pulls are the same and must make the minimum 5 lbs.
In the American games, there is no trigger pull limit and 2 lb Glocks are common.
Not that I recommend one for a beginner.
I believe starting in 2013 uspsa production division guns require a minimum 3lb trigger pull for the first pull.