Well, she's finally assembled.
Here's a parts list:
Exterior
G&P Special Forces Metal Body
Magpul PTS MIAD Grip
G&P M4A1 Crane Stock
Kings Arms 10.5" Outer Barrel
King Arms Metal Rear Sling Adapter
King Arms 7 inch Free Floating 7" RAS
King Arms Red Dot Sight with Comp Mount
10 x KA 68 round M4 mags
Guardian Muzzle Cap
King Arms M4/M16 Metal Body Accessories Set
KA Vertical Fore Grip
Internals
Pro-Win 7mm Detachable Mechbox
Prometheus Double Torque Gear Set
Marui EG1000 Motor
Prometheus Non-Liner Spring MS120
Mad Bull 6.03mm Tightbore Barrel - 363mm
Modify Enhanced Cylinder
Modify Polycarbonate Piston head
Modify Cylinder Head V2
9.6V Battery
Eventually I'll be putting a full length barrel on there, but for now the tracer unit silencer will cover the 363mm inner barrel.
Took about $1400 and 30 hours of work to get everything to fit just right, but it's worth it.