We haven't received any reports about overheating on the guns, and haven't experienced it first hand either. That being said, wouldn't that be a good thing in the winter
Gas port and piston does need to be cleaned every 1k, but should only take 10 mins and the Alien comes with a tool to do so
Honestly from first hand experience the Alien is like cheating, shouldn't be that easy to be so accurate. These routinely win production competitions, there were even cases where after IPSC reversed it's decision regarding the red dot (necessitating the IPSC retro kit) users took it into open class and were even competitive as-is.
All hope is not lost for those looking to pick one up, we have dealers across Canada that placed order with us back in Feb. we will be distributing to, so check with you local dealer to see if they had any on order. CRAFM is our Master Alien dealer and has ordered a good supply, they should be receiving in the next couple weeks