Mag Couplers?

[USGI]

If the carbine has a serious flaw, it has to be the magazines. Two tiny nubs are all that is holding the thing in the weapon. They are a wear item as the nubs eventually start to wipe off.

Here's pics of mags with worn nubs (nibs) - when they start measuring very much shorter than 1.5" from the top of the mag, you can start getting failures to feed. The mag shown in pictures #2 & #3 is about .035" short of that. I've got another "shooter" mag that measures about .020" short and it still functions OK. - Bob

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