I have yet to magnetize all of the arm options, but the ones I do have done work beautifully, with a small piece of ferrous metal glued to the arm, and the rare earth magnet inserted in body sockets I drilled with my pin vise.
Here is one configuration:
The figure itself is beautifully sculpted, and I could not resist putting him on a 20mm round since I had one handy at the time.
Here is another configuration:
The two-gun mojo thing really works on this guy!
And finally, a "mixed" configuration with hand-weapon and gun:
There's plenty of other great stuff on Andy's site, and one of the coolest things about many of his kits are the elements of choice he includes--multiple heads, arms, etc. Well worth a look!
--Scott