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
Flak 36 8.8 cm Anti-Aircraft Gun - Brickmania Toys
Flak 36 Anti-aircraft & Anti-tank Artillery
Lego WW2 Tutorial: How to Build 20mm Flak 38 [Deutsch] - YouTube