Recoil magazine posted that SIG SAUER is announcing a voluntary recall regarding P320 issue.
http://www.recoilweb.com/sig-sauer-issues-voluntary-upgrade-for-p320-129031.html
The details will be available on sigsauer.com on Monday August 14.
Update: Soldier Systems Daily covered the session held by SIG recently.
http://soldiersystems.net/2017/08/08/sig-sauer-acknowledges-p320-trigger-issues-with-30deg-drop-m17-mhs-unaffected-announces-voluntary-p320-upgrade/