M4 AEG Receiver Assembly (Urgent Help Needed)

[ThisIsAirsoftHD]

So i recently purchased a new receiver.. however its came with loads of parts and like dust cover, magazine catch etc.. ive tried looking at YT but i cant find any help.. if anyone could help even a little i would be so greatful!! please help

 

[ThisIsAirsoftHD]

View attachment 5537

 

[Nutster]

I assume you would like to know what goes with what, to make which bits? If so ill try to annotate your pic tomorrow when I have a spare 10mins