Originally Posted by SuperHog
The best M4 is the one you use the most and maintain so it keeps on ticking. There are guys that run only GBBR in warm weather then switch to AEG when temps get cold.
See, I see what you're saying, but this is what I'm talking about. The best anything is one you don't have to switch out just because of the temperature. If it can't take hot or cold, to me it's discounted as possibly being the best. Also other limitations to other guns throw them out of the ring as well.