My friend Kris K. complied a few pics showing some HK416C out in the wild. The HK416C is a short barreled PDW with a collapsing stock. I have only seen the HK416C by VFC.
Umarex has a licensed airsoft version made by VFC in Taiwan.
I thought the 416C was just an airsoft creation. Clearly not as you can see in the photos below.