Before we got a great indoor facility we played in any weather. V2 boxes would usually break below minus 10. Hand warmers on the battery guaranteed kept the ROF high or just running a long line in the sleeve and have the battery in the jacket.
V3 we never had any issues at all. The coldest we played was -35 and the guns ran great. As mentioned before it's the hop-up rubber that you need to worry about as long as your aren't running a V2 box. Hop-up off and we had some really great times in the winter.
Pics are from the -35 game.
