Check out AL-X Assault Rifle Low-poly 3D model on CGTrader for $35. High-quality mesh by StormBringerStudios: 24000 polys, 19000 vertices. Rigged, Animated, PBR.
OBJ (OBJ, filesize: 3.73 MB), FBX (Autodesk FBX, filesize: 558 MB), MAT (mat, filesize: 250 MB), UNITYPACKAGE (Unity 3D, filesize: 250 MB), TEXTURES (Textures, filesize: 554 MB), PNG (PNG, filesize: 795 MB), PDF (PDF, filesize: 554 MB), UASSET (UnrealEngine, filesize: 303 MB), PSD (Adobe Photoshop, filesize: 241 MB)