Texas Department of Public Safety is halting its adoption of S&W M&P due to concerns raised including failure-to-feed and failure-to-eject, sights moving 10 microns(0.01mm) after 3000 rounds. That is about 1/30 of a MOA, which is not too far off from some other manufacturer's tolerance.
This is not the first time M&P had setbacks when adopted by a large agency. Los Angeles Sheriff's Department had issues.
http://www.texastribune.org/2014/04/17/dps-suspends-use-new-handgun-over-concerns/
From: Texas Tribune
