I really love the look of this rifle and with that cerakote really nice. I was considering one of these to but the updated gen came out after I had already pulled the trigger on a Kodiak WK181C-Z Gen 2 based. And reading the previous gen M10x steered me away. But still no regrets from me, I am about 1500 rounds of surplus through my WK181C-Z and no complaints here either.
Only issues I had goes back to the mags like you. Bought 4 extra from Cabin creek supply and they put it to high for some and one mag couldn't pull bolt back when closed like you. It's so stupid how that works, I thought the PMAGs were pre-pinned by MAGPUL. At least they shipped me a new one without anything but the 3 others I bought from them will still cause some rare failure to feed or stovepipes.
It sucks RDSC made you pay it back, I ordered an item from there and took a look at their return policy in case it wouldn't work out and yeah it's really bad. Never ordering from them again just in case.