Can someone post a photo of the trigger bar sear arrangement on the SD pistol? I was looking at the Sigma set up with the trigger bar only acting upon one side of the sear, equals sloppy sear disengagement that helps give the Sigma line the reputation for gritty triggers. So if anyone that has an SD and camera, please post a picture of your pistol's guts. Thanks.

Really!!!! Guess I wasted my time polishing the sear cam face and slot Doesn't hurt to polish the trigger bar contact areas either though. FWIW I found most of the grittyness in the sear slot

Picture your looking for has been posted a couple of times here already. Trigger bar arrangement is the same on the Sigma & SD. (and G***k and Ruger & many other pistols)

My guess is 99% of guns using a trigger bar only operate on one side of the sear. Also if you search the pictures are already posted.

This is a duck and this is a chicken. They both have feathers therefore they must be the same. Wrong, except they are both bird brains.

On Glock's the sear is attached to the trigger bar (same piece of stamped steel) = direct contact with the striker. Thus a balanced interface with the striker.