Check out Mauser C96 Sand Tacticool Low-poly 3D model on CGTrader for $14. High-quality mesh by Akinaro: 22900 polys, 11720 vertices. Rigged, PBR, Textured.
OBJ (OBJ, filesize: 137 MB), FBX (Autodesk FBX, filesize: 136 MB), DAE (Collada, filesize: 139 MB)