Your definition of bad trigger is strange.
Jose I think that you and I have been thru this discussion before.
I've shot a "sample size" of 5 M&Ps and my biggest criticism is that unlike the Glock, the M&Ps tend to vary a considerable amount in the mfg process, from sample to sample.
For others who won't use "search" and might be interested, here's the stack-up.
- M&P 45 US trigger at S&W Shooting Center. It undoubtedly had countless rounds thru it. Decent trigger.
- M&P 45 US trigger, NIB with 11# pull, after 700 rds it was down to 8#. At the 8# mark it was fair. Derr trigger job to 5# and it is now real sweet.
- M&P 9 MA trigger at S&W Shooting Center. It undoubtedly had countless rounds thru it. Poor trigger, but not terrible.
- M&P 9 US trigger, NIB with 8# pull, but very gritty feel to it. Derr trigger job to 5# and it is now real sweet.
- M&P 9c MA trigger with a Santurri 4.5# trigger job. Real sweet. Prior owner had this done before I bought it.
All trigger pulls (except S&W SC) were measured with Lyman Electronic Trigger Gauge, averaged over 10 pulls.
YMMV and the mere fact that many differ (confirmed with JonJ in discussions about the new M&P 45s that his PD obtained) means that each of us will have a "different experience".