So, despite multiple people telling me to stay the hell away from this thing, I bought it: the Well Mp5 SD5. Unfortunately, I accidentally all external pictures of it, I'll put some up later on when I put it back together.
Externals:
Externally it's all quite glossy plastic other than the stock and grip, which have a nice matte finish. The mag release, trigger, and charging handle are all plastic. No RIS rails unfortunately. Pictures coming later when the gun is back together.
Internals:
"XYT" gears, plastic spring guide. The piston head and cylinder head have absolutely amazing c