double barrel shotgun 3d model

"Generate a highly detailed 3D model of an Over & Under competition shotgun based on the provided reference image. Reconstruct all fine details including the wooden stock, checkering pattern, barrel geometry, ventilated rib, triggers, and metallic receiver. The model must be fully optimized and clean for 3D printing: manifold mesh, no holes, no non-manifold edges, and proper watertight geometry. Preserve real-world proportions and accurate dimensions. Export as an STL or OBJ ready for 3D printing."