The CI I'm modeling also carried three forms of armament (four if you count bombs): a Parabellum, a Danish Madsen (over the wing), and with a GeWehr 98 tucked into a rack for good measure. The GeWehr 98 is from DID, the Parabellum is from Williams Brothers, and the Madsen is scratch built.
As I mentioned elsewhere my plastic modeling (painting) skills are less than ideal. I feel that someone more skilled could have done a better job on these. My basic technique was just to paint the entire gun with flat black and then selectively rub on pencil graphite. I also did some light weathering with oils on the rifle.