I ordered it from the sigguy.com website. It’s the same thing. I did what you did and took the disconnector completely off, put the slide all back together and it slides back like butter(don’t worry I’m not going to carry or shoot it this way). So it’s got be either the disconnector(I really hope so) or my trigger bar spring is too tight. There’s another guy I’m talking to online who’s dealing with the exact same issue right now and he said he’s tried everything, including changing out the disconnector. I polished the disconnector but I’m afraid to remove any material because the trigger bar has to be pushed almost completely down by the disconnector to disengage the sear. Hopefully a new disconnector solved my issue like it did yours. I’m thankful I found your post…I was working through the problem and had it mostly figured out but finding your post definitely reassured me I was right, I also would have never thought to order a new disconnector…I would have assumed they’re all the same but according to you they’re not!!!