Hey, I have created a low poly 3D model of a Mortar from the attached reference. Software I use are Maya, Z brush, Substance Painter, Marmoset Toolbag4. The total polycounts are 18402 in the mortar model.
Prespective View 01
Prespective View 02
Left View
Right View
Back view 01
Back view 02
Top
Wireframe side
Wireframe back
Wireframe front
Turntable
Reference