I really want this to work.
The D60 is an excellent design, it’s drawback is that the drum shape is bulky, and the options for ergonomically carrying the D60 are very limited. The best advice I have heard about using the D60 is to start with the D60 in the gun, and to then transition to stick mags which are easier to carry.
Ignoring issues with the launch of the Surefire-60, the major critiscm is the aluminum construction. If the feed lips become misshapen or damaged, the magazine becomes unreliable. This is the issue that has historically affected aluminum magazines. If a polymer magazine has damaged feed lips, they tend to be cracked or partially missing, which is easier to identify as a problem compared to out-of-spec aluminum feed lips.
I’m working on a PCC as my current AR obsession, but once that’s complete, I would love to try an IAR-type gun and would absolutely try these mags.