105mm Flak projectile

This is a high explosive projectile fired by various 105mm guns used by Germany during WW2, mostly anti-aircraft (Flak), but also the deck gun of Type IX U-Boats. It's designed to be crimped onto it's shellcase, so not compatible with field guns firing 2-piece ammunition.

The nose fuze is a separate Thing:
https://www.thingiverse.com/thing:5023000