My first experience with an airsoft gun was when my mate bought a HFC M9 in-store from justBBguns. This was in December that year and when we go home we eagerly ventured out to my garden, where we fired a mag or two on green gas. When we attempted to get through another, we noticed it was no-longer locking back.
"This piece of >insert your own expletive here< has broken! We need to take it back!" he furiously proclaimed.
I wasn't overly keen on this idea, as it's a three hour round trip....but he had paid around £150, so back we went. When we got there, they demonstrated that the gun cycled perfectly, even locking back on empty. Long-story short, the gun was fine but no-one had explained the negative effects of cold weather on a gas gun.
I have owned a VFC Glock 19X and it worked really well overall. However, when it was cold it would do the same thing, only shooting every couple of cycles. My point is that as adults, we should take a moment to analyse the situation, rather than just jumping up and down screaming "Not fit for purpose, consumer rights act!"