https://aais.ria.army.mil/aais/award_web_05/W52H0905D02330000/000000.pdf
Looking at the above recent contract modification, one of the changes stipulates that:
"c. The single action trigger pull is changed from “1.80KG - 2.90 KG” to “1.80KG - 3.2KG”.
Just an “easier to manufacture” thing or is this some new Army requirement?