This is Optimus Prime's gun from G1.
With a little modification so it doesn't look so boring.
This model was absolutely created by myself.
I based it on the look from the cartoon, which is where this model came from (Transformers:G1).
I think it's similar, and again, with small modifications)
!Important! When you download the archive, you will have two folders (one with materials and one without) Folders with different types of versions Blender file (main ) DAE FBX MTL OBJ STL X3D
Vertex 3130 Faces 3017