Ok, I was really bored so I completely tore down my 4006 to bead blast some shiny holster wear spots on the frame. Here is what I discovered when putting everthing back together. There is a small difference between the 5904 and the 4006. The 5904 has a small copper tab or bracket riveted on the trigger transfer assembly (the thingy that goes from the trigger back to the sear part behind the magazine). The 4006 doesn't have one-but it does have a hole for one to be fitted. Is there one missing? Should I care? Will Smith & Wesson fix this?

Pictures:

Ok, I was really bored so I completely tore down my 4006 to bead blast some shiny holster wear spots on the frame. Here is what I discovered when putting everthing back together. There is a small difference between the 5904 and the 4006. The 5904 has a small copper tab or bracket riveted on the trigger transfer assembly (the thingy that goes from the trigger back to the sear part behind the magazine). The 4006 doesn't have one-but it does have a hole for one to be fitted. Is there one missing? Should I care? Will Smith & Wesson fix this?

Pictures:

In my 4006 and 4003 the trigger bar has that copper piece in it. You can order one and the rivet that holds it in place from S&W.

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J.D. Roy

Yes, you're missing the trigger play spring and rivet. I'm sure you can notice a difference between the triggers. I bet your .40 has a click in it.

You can do yourself if you know how, have a gunsmith do it, or send it back to S&W.

The guns function fine with or without one. The spring takes some play out of the trigger and keeps it to the rear.

The police in California have used 4006's for many years, and when the springs break they don't even replace them. When they made a large order of new guns they wanted them without the springs.

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To be a rock and not to roll