No magazine! - AR57 ULT 12in Barrel 5.7x28mm Upper Receiver Assembly

This is the second one of these uppers I have ordered. The first one was from Aim Surplus when they first came back in stock in July of 2023. That one shipped with a 50 round mag. I enjoyed it so much that I ended up ordering a second one through Optics Planet. However it did not come with any magazine at all! This is quite disappointing. I've contacted AR57-center and have requested the expected magazine. However if they do not provide it I'll have no choice but to return this item to OP and order elsewhere.