If you need 922r parts, the Timney would help out there as well.
After spending an inordinate amount of time messing with the stock trigger parts, I'm about ready to buy a Timney myself.
I've done the HBi springs (biggest improvement). Shimmed the trigger, but have had the rearmost shim work loose twice, causing malfunctions. Welded and filed to replace those shims, which was quite a project. The 922r compliant disconnector broke, causing hammer follow.