Check out BT GL06 Grenade Launcher Low-poly 3D model on CGTrader for $7. High-quality mesh by cgtdg: 28000 polys, 15000 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 596 KB), 3DS (3D Studio, filesize: 519 KB), BLEND (Blender, filesize: 86.6 MB), DAE (Collada, filesize: 1.42 MB), MAX (Autodesk 3ds Max, filesize: 1.54 MB), FBX (Autodesk FBX, filesize: 1.03 MB), DXF (DXF, filesize: 1.14 MB), TEXTURES (Textures, filesize: 168 MB), PNG (PNG, filesize: 168 MB)