Old news dude. These problems only seem to affect the newer batches, the originals are very good for a £70 pistol. If your expecting them to them to be hand machined from steel then your bound to be disappointed, but if you want a cheap and well made replica you can shoot then they are still the best available for the price.
As I am sure others will say as well, mine has now had thousands of BBs through it and it still shoots as well as when I bought it.
Hopefully they return to their original quality, and magazines become freely available.