I had to send back a brand new PC 686-LR back to the factory about a year or so ago. It had this glitch in the DA trigger pull, not to mention ridiculously heavy. I could see that the sear was fitted poorly. You could actually see the hammer kind of cam to one side as you slowly pulled the trigger. Since I thought it to be a really cool gun, I bought it even with this defect! This was in a gun store that keeps a large Smith inventory, but only one of these. I know you pay your money and take your chances when you order a gun not in stock. Here's what I did to put a smile on my face:
I called Smith and asked to speak with someone in the Performance Center. I politely stated my concerns and was told a Fed-Ex shipping label would be sent out. Label arrived promptly, and I even received a follow up letter with work order that my gun had been received. The gun was back in my hands within 10 days after it left my house. Trigger pull was nice and smooth, although still over 10 lbs in DA. Performance Center guns apparently do not get that factory "action job" unless you pay for that service. No, problemo........I tuned that gun to my tastes. Now the gun is simply WONDERFUL!
Bounty hunter..........I did take a look at a forged trigger from an older 14-4 to see how that trigger lever is pinned. I don't see see any obvious stake marks, and my pin is in there tight. I'm sure you can punch it out if so inclined. I've asked Smith for certain small parts in the past, sight pins and such. They were sent at no charge. Now, I am kind of curious about the composition of that 686's trigger lever. I do have the proper forged hammer parts with a pinned sear and mainspring stirrup. I really do not care for the way those parts attach to the MIM Safty-Lock hammers, especially that stirrup. Personally, I would send the whole gun back with a list of your concerns. I'm sure they will make it right. I believe a PC gun gets quick attention. That was my experience. Incidentally, a gunsmith in Iowa named Heffron has a blog, and he was just criticising S&W for slipshod quality. If you google his name, you can see what he has to say.