Hi
I am the new owner of a WE SCAR GBB, and after the first test propane/silicon oil mag with newly lubed internals, the following occured:
-during the (semi-auto) firing, the changing handle (and hence bolt carrier) got somewhat stuck. It unstuck when I put the gun on safe to investigate.
-while stripping the gun, a small amount of BB shavings were discovered, perhaps one shaving per 10 BB or so (0.3 g BB Bastard)
-the disk and the disk's pin on the firing hammer were dislodged and free within the gun
-the hammer in the trigger assembly shows signs of (what I think) is premature wear
Here are two pictures to illustrate. Please excuse the quality, I am not a good photographer, and these are matte black parts in a matte black casing.
1. the lower receiver

2. the dislodged parts
Now, I am quite worried about this malfunction. While I can put the disk back in place, I do not trust such a solution to work due to the ease with which it got out and the wear of the hammer.
Does any one know what might be the cause of this?
Thank you.