These are all custom parts made from scratch inside the app by PMG users more talented than I. So to reiterate,
I made nothing in these pics unless otherwise noted!.

^The two railed gas blocks on the bottom left are my designs, the other two were made by
URBANrecon.

^The M203 MWS sight is also my creation. Yes, I know the thumb screw is on the wrong side and it was done on purpose to make it look more interesting.
I also have an extended rail system for the FN SCAR called an "SRX" or something like that that hasn't been added to the kit yet.
Most of the parts were made by
trapezoidCQC, the TA31ECOS on ARMS throw lever mount was made by
miko.monday, and the detailing on the KAC rail systems was done by
pigs_never_fly -black ops is a life style choice. The URX rails with integral BUIS, upper receiver with side-mounted charging handle, suppressor, black ambi-control lower with red and white fire selector markings, Vltor stock, and PMag in the first pic I found on an airsoft forum a long time ago, but the person that posted them said he/she/it/whatever found them elsewhere and didn't make them, so I've no clue who or where the actual author is otherwise I'd track down his Internet name and give credit.
I've been accumulating this stuff for so long (months now) that I can't remember who exactly made
everything. In addition, a lot of the original export codes had ghost shapes and off-screen parts that I painstakingly went through to manually remove. If the mods don't have any problem with it, I can upload a zip file containing pics and import codes for all this stuff for anyone here who wants it.