I just received my KJW M4 cqb.
The exterior finish was not what I was expecting. To plastic looking and shiny, and I cant really tell if its metal or plastic. Overall the gun is lighter than my We m4 cqb, which is a plus. The internals are very simple and looks easy to work on.
I cleaned the internals and applied some frog lube(great stuff). Took it out and emptied about 4 mags, and so far the hop-up seems to be working just fine. didn't notice and excessive wear on the BCG. but their is small chip on nozzle, where the mag gas release kisses the nozzle.(not share if that made sense).
There