I got 1 magazine with my rifle just before the New Year 2021. The rifle itself is great. But yes the mag got out of alignment on my first pass at shooting the rifle. This led to a jam. I had a tremendous amount of difficulty removing the mag but got it done. This appeared to be because the mag double rotated and left it in a position where it was jammed. Upon removal it broke the tiny (emphasis on tiny) sliver of metal that is supposed to be a magazine stop. I can't think of a more flawed design in a magazine to be honest. In addition to that, with the exorbitant cost of these magazines you'd expect them to be nearly flawless in operation.
I emailed JSAR about 15 times already with zero response in almost 6 months! I left phone messages, nada. I whittled out a piece of wood into a single shot tray to shoot the rifle. But nothing from JSAR. Zilch.
By the way, they still owe me a second magazine because I ordered two. After nearly 6 months you might wonder (if not downright claim) that they ripped me off by taking that extra money for a second magazine and not delivering, let alone give me a faulty product.
Recently, as of this week, I mailed the broken magazine to CARM magazines to see if they can produce a serviceable one. Although it is not supposed to be a swift turnaround and there is no solid commitment I was told "it looks like it can be done". It might take months to get a good mag but if I do, I will announce it here.
JSAR has no concept of support, obviously. You can hate me for saying that but it's true... That's a certain recipe for a dinosaur destined company. Sad because I like everything else about the rifle. Part of me is I love the rifle, the other part is I want to kick someone's head in for this experience (I wouldn't get violent but it's pissing me off).
