If you do a lot of hard surface modeling in Blender, You might be able to do it a lot faster, thanks to the Hard Ops add-on. the toolkit is a hard surface modeling add-on for blender that makes modeling quicker, and easier. The idea is to leave topology at the door, and simply create. The toolkit focuses on having you quickly knock out hard-surface models and concepts quickly and easily.
Here, Jayanam.com walks through the hard surface toolset, creating a really simple asset that shows of the power of using the add-on for modeling and developing concepts. In a second part, there is a little tutorial showing how you can take the newly connected model into Substance Painter to create textures and materials.
Hard Ops add-on can be purchased for $15.