On the B&C forum I came across a great post about the use of magnets to give your minis multiple weapon options, and decided I just HAD to have that for my sergeants.
The paintjob is still WIP, but it works beautifully. Make sure the magnets ATTRACT each other before super gluing them on the arms and bodies. I used a marker to indicate the correct side, so I wouldn't screw it up.
The magnets I found on ebay.I can recommend the 1/16'' X 1/32'' magnets (Approx 1.5 mm.). For 100 magnets you'll pay approx 12.75 euri.