Conversation about braces and 922R has been fast and furious with ATF publishing, then correcting itself on the issue.
In case anyone is worried about compliance, the ShootingSight 2-stage trigger is not only an excellent upgrade, but counts as 3 parts for 922(r) - hammer, sear, and disconnector. You add your own trigger bow, and if you use one of the US made ones, it counts as 4 parts.
To help out, I have created coupon code '922' which will give you 10% off on these triggers.
https://shootingsight.com/?product=cz-scorpion-evo3-2-stage-rps-trigger-drop-in-cageArt