Wrong part - Mossberg 95219 FLEX Shotgun 6Pos Synthetic Black Stk

I didn’t realize that a flex stock is for this new Mossberg modular system. It would of been nice if there was some sort of warning that it wouldn’t work on a regular Mossberg 500. More lines Okay. It wants me to type in more lines. It would be nice if Optics Planet also offered the other parts that it’s going to take to get this to work. It looks like a really nice stock but since it won’t fit on any of three Mossberg 500’s that I have it won’t do me much good at all unless I can get the other parts to make it work. I’ve been waiting for this to show up for months now and it’s the wrong part for a standard Mossberg 500. And I haven’t received a single shipping invoice for the three different shipments for this one order, so I don’t even know if I ordered the wrong part or it just got shipped to me.