This is a discussion on M&P40c is SA? within the Defensive Carry Guns forums, part of the Defensive Carry Discussions category; Originally Posted by Phantoms I was under the impression that the M&P series were suppose to be DAO pistols. After examining my new M&P 40c ...
It is SFA striker fire action.
Try this safety check your M&P When you pull the trigger on a M&P the firing pin clicks, now You DON'T need to rack the slide all the way back just 1/10 of an inch. Then the pin will be set in place again. A DAO or SA would require you to rack the slide all the way back but not the SFA.
This is part of the internal safety S&W put into the M&P lineup the pin sits 99.9% cocked that other .9% is you pulling the trigger to make it go boom!
Ok, with the slide off, the wire pushed back down to reattach the Striker release, I can see that it's rocking action may actually push the striker back .9% However, the striker is still being pulled forward under spring pressure. All pulling the trigger is doing is releasing it (by rocking the striker catch release down). The slide only has to move a small amount to place the striker in the firing/cocked position. To me this still appears to be SA (or maybe .9% DA), but then I've never understood the term SFA either.
I never associated SA with a slide having to go all the way back. I always understood it as only having to release a cocked striker/firing pin or hammer which engages a firing pin. I understand DA as having to both cock the firing pin/striker (or hammer) and release it in one trigger pull.
Are you worried about the gun going off when pulling the trigger?
This is no different than any other striker fired gun including your daughter's Kahr (the kahr simply has a slightly heavier trigger pull, but not much). Yea, some are 75% cocked, others are 99.9% cocked but at the end of the day pull the trigger, they'll all go off.