https://www.cgtrader.com/3d-models/military/gun/oerlikon-20mm-aa-gun
3D model Oerlikon 20mm AA gun VR / AR / low-poly | CGTrader
3D model Oerlikon 20mm AA gun , available formats OBJ, FBX, STL, BLEND, DAE, GLTF, ready for 3D animation and other 3D projects
3d modeloerlikon 20mmaa gunvr arlow poly
https://docs.google.com/spreadsheets/d/1ixx2JOhgFJdote0DVnmrrxIS_1leLZljEC-Dz15-YgA/edit?usp=sharing
AA Gun Calculator v1.4.2 - Public - Google Sheets
aa gun4 2calculatorv1public