Not quite... the Sigma has one of the worst triggers I've ever felt. The overall quality of the gun was poor which was why it was discontinued.Yes yes yes, we've heard this argument before. However, the "copying" issue was not related to the M&P, it was related to the Sigma...ironically, the low man on the totem poll of the S&W polymer line. Now think about that for a minute. The bottom of the barrel S&W is equivalent to a Glock.
The SD trigger is just as bad which is why it too is a flop.