With 3.0.x update we've delivered weapon system changes. But we did not stopped there more cool features coming.
https://www.youtube.com/watch?v=FzIs_cjTH3k
Bullet penetration and ricochet depending on materials.
Weapon tuning and crafting system.
Sharable ammo between guns.
Better damage model.
Improved AI.
New types of enemies.
Keep tuned and please provide feedback on Steam forums!