Just received Cinema 4D 2012

[Soquili]

This is simply to show how I would begin modeling a MK-2 "pineapple" grenade in Cinema 4D version 8. Hopefully this will be similar enough to C4D version 12 to be of some help to the OP.

Started with a cylinder and gave it 5 Height Segments and 8 Rotation Segments.
Played with Edge selections to give it the familiar shape.
Beveled the Edges then selected the polygons (faces of the segments) and extruded them then scaled them (down sized).
Selected the top edges and moved them to create the 'neck' of the grenade.
Applied some textures to see how it looks before continueing to model.