|I bought two of these.
These magazines were very cheap, which is good, but you get what you pay for in this case. One of the magazines I bought was somewhat wide, and very difficult to get into my M1A.
On top of that, the cartridge retaining lips on top of the mag are too high, causing the first and third round, when fully loaded, to depress the bolt catch on an M1A. This prevents you from releasing the bolt when inserting the mag. I had to take pliers to the retainers to get them to function correctly.
Finally, the mag barely fits 20 rounds. One of the mags I bought can only fit 19. The 20th just won't fit unless I literally bend the metal.
Also, a minor note, but these magazines are more grey than black.
I'd recommend just paying an extra 10 dollars and getting magazines that work.|