That's a model of the 20mm cannon Giat M621. It was designed to stand on a helicopter. Originally this autocannon uses on a French Gazelle helicopter. You might use it to put on a helicopter.
It has 3 items that call accordingly:
GunBelt has 2 materials: M_Bullet_01, M_Plastic_01
Cannon20mm_P01 has one material: M_Canno_P1
Cannon20mm_P02 has one material: M_Canno_P2
Preview images contain a color scheme of items, if you need another grouping, please, just contact me.
The textures use Metal/Roughness workflow, so the materials use the following type of textures: BaseColor, Metalness, Roughness, Normal. Also, the pack includes Ambient Occlusion and Curvature maps. The resolution of the textures is 2K and 1K(for part of the machine gun).
The model is presented in different formats: FBX, OBJ, Lxo(Modo), Uasset(UnrealEngine)
Unreal Engine scene contains:
The model of the cannon - SM_Cannon_20mm
Materials: M_BaseCannon(Base material) and Material Instance for other parts of the geometry. Also, there is material of the grid and material for wire.
Level: LVL_Preview_Cannon_20mm
Level Sequence: LS_360 It's presentation of this model
Textures: BaseColor, MRAO(Metalness, Roughness, Ambient Occlusion), Normal (12 Textures of the model and 1 for a grid)
The Unreal Engine version is 4.27, if you need another version, just ask me.
The model contains:
27343 polygons and 27587 vertices
2UV channels: 01_UV_Cannon_Сombined and 02_LightMap(That's good for baking light)
Thank you for your attention!