LEGO MOC Panzerkampfwagen E-100 Tank (12.8 cm FlaK 40) by MekanismBricks | Rebrickable - Build with LEGO
Amazon.com: Octopbrik Flak Anti-Tank Gun, Military Brick Sets, Compatible with Major Brand, Army Series Building Block with 2 Soldiers Figures (258 Pieces) : Toys & Games
Me 163 Komet
LEGO MOC 2° World War MOC Series - Flak 88 Tank-Destroyer Gun and Pak inspired Ground Gun by Bullyslayer 24 by DreamsOnlyOwnsMakers | Rebrickable - Build with LEGO
LEGO MOC LEGO WW2 FlaK 36 by The_Lego_Crew | Rebrickable - Build with LEGO
I tried making a WWII FlaK 36 anti-aircraft gun. How did I do? : r/lego