Yep, I had problems with the Axis mag (.223). Feeding worked well. The mag would drop out every now and then. Frustrating. Just don't understand why such a simple part is so unreliable, especially when using cartridges proven to work well in magazines. And why 'invent' a new mag design when the military stuff is out there. Just take that existing design, cut to fit the stock.

I guess I do know the answer. Cost. The addition of a decent mag well and latch would cost a few cents more than a molded plastic lip and retainer.