ZPDW Gen2

This is a new personal exercise, this time trying some realistic but discreet design.
Inspired by g11 and magpul.
The idea behind the design is a simple, intuitive weapon. The usage scenario is a weapon used by non-combatants for mid-range self-defense. It uses a shotgun-like ammo, but smaller, with finely divided spikes inside, which reduces penetration and enhances stopping power, has 45 rounds of ammo and a fully automatic fire mode.