$59 M1897 Trench Gun Low-poly 3D model by luchadordev. Available on CGTrader with 23128 polys and 12116 vertices. Check it out on CGHub.
MAX (Autodesk 3ds Max, filesize: 66 MB), OBJ (OBJ, filesize: 132 MB), FBX (Autodesk FBX, filesize: 66 MB), SPP (Substance Painter, filesize: 537 MB), TEXTURES (Textures, filesize: 191 MB), TBSCENE (Marmoset Toolbag, filesize: 66 MB)