$55 High-precision Sniper Rifle 03 Low-poly 3D model by OlegShuldiakov. Available on CGTrader with 1000 polys and 1500 vertices. Check it out on CGHub.
OBJ (OBJ, filesize: 3.05 MB), FBX (Autodesk FBX, filesize: 3.05 MB), MAX (Autodesk 3ds Max, filesize: 3.05 MB), MA (Autodesk Maya, filesize: 3.05 MB)