Hi, I recently purchased a full receiver for my JG M4.
When I took apart my JG M4, I find that the feeder, in the metal body is missing? (I'm not sure if it's supposed to be gone, or whether it's supposed to come with another part) My ABS receiver has the feeder installed, but the Metal body does not.
I will provide some images below, to show you what I mean. This is my first airsoft gun as well, so I have little knowledge about it. http://oi42.tinypic.com/10xby53.jpg
Lower left corner: feeder?http://oi39.tinypic.com/izyo2t.jpg