Pictures comparing gen m2 and gen m3 pmag 20, as requested by billt.
The first picture is a side by side comparison of the two mags with the m2 on the left and the m3 on the right.
The second picture is of the m2 inserted into the rifle. (I really like the line created by this setup.)
The third picture is of the m3 inserted into the rifle. (This should still work fine with a bipod, etc. but I don't like it quite as well.)
If anyone would like a different angle or comparison, please let me know.