They changes it in the 2019 rule book to allow aftermarket springs and trigger assemblies.
Can the SA trigger be used on a DA/SA gun? Does it require modification?
I was curious to try a flat face perhaps.
it's the sear and hammer that you're looking for. a zero or 1mm sear from Robin Sebo and a match hammer will set you up. If you really want to play, the full CGW setup with an adjustable pretravel trigger is sweet too.
How do you bring CGW parts into Canada?