AEG CM16 Raider won't shoot bb's after being in cold weather. Help?
 

So yesterday I was shooting my CM16 Raider outside, and it was about -2 to -5 celsius. About 2 minutes into shooting, bb's were no longer coming out. The gun still fired, but nothing came out, and it made a slightly different sound than usual. I also noticed that when taking out the mag, 5 bb's came out of the gun instead of the usual 4.

Your gearbox cracked or you've lost all compression. 5 bb's coming out of the hopup unit is normal because of the distance the magazine feeds to the hop-up unit.

Take it to a tech.

Could also be a stripped piston or the piston let go from the piston head (had that happen before)

Unless you're opening it yourself, you're going to have to take it to a tech regardless of what's broken.
And if you ARE opening it yourself, you should find the problem pretty darn easily.

What I can say for certain, is that if it's a stock gun I'm not at all surprised it broke in -5. The G&G green hop rubber is good for that, but not the grease in the cylinder head.

Could also be what happened with my m16 and the top of the hopup cracking

Could be as simple as a bb stuck in the hop up or barrel get something that will fit in the barrel long enough to reach the hop up slide it through with the mag out being careful not to scratch the inside of the barrel

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