Looks like it got the tarted up Tijuana Buick treatment. Three portholes? Really? Red and green plastic sights? Has the G43 eaten into the Shields market share this badly?
Wow, first post in 5 years and it's a duesy. I can't really help you but I saw a picture on another forum where a guy did the same thing to his Glock, if that makes you feel better. I don't remember how he got it apart but he eventually did. Good luck.
The top-most round in the magazine should show a slight scratch from the bottom of the slide as it slid over the unfed round. If the cases are brass the stainless (thus harder) slide should leave a distinct mark compared to the brass on brass contact made from loading the magazine. I'm not sure...