Quote Originally Posted by jcustis View Post
Isn't that always the case?

The original requests for proposals on the IAR calledfor a 50-rd magazine, and I think it remains in existence.

I finally saw a SF 60-rd mag at SOFIC and gained an appreciation for its size and bulk. Definitely best for an AR gunner as perhaps the first upload, and a few more distributed through the squad, but not the ammo container for the remaining combat load.
That's what we were thinking, initial mag to react to/initiate an ambush. The 100 round ones I saw looked too long to use in the prone, but 60 looked like it would work with the bipod.