Originally Posted by RandySmith
Flipping the insert aside is the key to disassembling a magazine.
That's what got me at first. With most magazines, the insert doesn't have to be flipped. You push the nub in a bit and out it goes. Eventually I understood that the insert prevented the magazine sidewalls from squeezing and the that is why the insert has to be flipped out of the way.
Even after I figured it out, there was one mag that gave me a hard time. A G27 I think.