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Discussion Starter #1
I'm coming from Glocks where the cruciform sear plate drags the striker further to the rear and then releases it - the striker at rest is only partially tensioned.



When I look at my new M&P40c, it looks like the striker is completely pretensioned when ready to fire. The trigger bar appears to only depress the firing pin block and then press against the sear releasing the striker.



Do I have this right?
 

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No. With the slide off the frame, insert an empty magazine (if required) and watch the sear movement. The sear engagement surface is circular and the striker leg is straight. There is some rearward motion of the striker.
 

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Discussion Starter #4
I don't know if I'd call the small additional movement of the striker that is caused by the sear dropping DA! OK, I just wanted to be sure I wasn't missing something major...
 

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The sear doesn't move straight down; the sear moves down in an arc. As WR stated, this arc pulls the striker to the rear a little bit before it breaks.

As Falls stated, that is why it is technically double action.
 
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