I don't think AirsoftMegastore is dishonest, but perhaps just horribly disorganized. I got a Beretta M9A1 CO2 blowback pistol from them in December. After less than a dozen clips of BBs, the clip broke. I feel it was a manufacturing defect
For weeks, tech support dodged giving me an RMA. In frustration, I ordered what I thought was a replacement magazine. (I asked tech support for the correct SKU number, but they did not reply.) When the mag arrived, it turned out to be for green gas. Oops, another RMA. Wait: there's more!
So here it is, over a month later. I have no replacement clips, In fact, airsoftmegastore claims the first RMA number is not even for me, but for another customer!
So if you buy from these guys, you better hope you never need their tech support.