Do not buy these magazines! - Amend2 AR-15 6.5 Grendel 10 Round Magazine

I purchased 5 of these thinking they would be Magpul-like in terms of quality and durability and I actually prefer polymer mags over steel. They look cool, but that's where it ends. They are insanely difficult to load because the feed lips are more narrow than the rounds being loaded, so just popping them from the top does not work. Additionally, they start out as a single stack then migrate into a double stack further inside. There is a 1/2-inch block on the left side of the magazine that is intended to keep the rounds straight but further inhibits loading the magazine. You literally have to load the rounds from the front of the magazine and then slide the rounds aft to load along the follower to load. Once loaded, the follower also tends to jam nose down and prevents rounds from chambering properly, especially when down to the last few rounds. All five mags have the same issue loading and fail to feed reliably on multiple rifles. My Duramag 6.5 Grendel Stainless Steel Magazines load and function without fail. I imagine that the Amend employees do not use the magazines they make. These things are junk.