JRT
NES Member
Intersting article regarding LA County deputies negligent discharge rates after switch to M&P. The article doesn't specifically state the triggers are stock. It does note that in NYC they add a stiffer trigger to all standard issue guns.
Accidental gunshots by Los Angeles County sheriff's deputies have more than doubled in two years, endangering bystanders and occasionally injuring deputies. The jump coincides with the department's move to a new handgun that lacks a safety lever and requires less pressure to pull the trigger.
http://www.latimes.com/local/california/la-me-sheriff-guns-20150614-story.html#page=1