Quote Originally Posted by Kadagar_AV View Post
I think the thing with the 5,56 and cold is due to USAnian mag's were made of a plastic that didn't do to well in the cold...

I just now remembered a officer telling me about it more than a decade ago. You need cold steel mags up where I fight, once you have those it really isnt an issue...

But let's remember USAnian troops are equipped by the lowest bidder... Swedish arctic rangers are equipped by the state. Therefore, I guess, plastic vs steel.
The new composites (graphite fiber I think) handle it just fine. The first few years of M-16s did have a lot of problems resulting from the characteristics of the early bakelite plastics though.