Magnetising your XV's is an easy process, it only cost a few £'s or $'s and will save you time and hassle swapping out your weapon load-outs. You will need :
2mm drill bit.
small hobby drill (available from GW or Tamiya etc)
2mm X 1mm round neodynium magnets (many places to get these; Ebay online shops etc)
What you need to do is:
1. The magnet will almost fit in the weapon slots on the arm/shoulder. Take the drill and give a turn to remove some of the plastic, the magnet should fit in snuggly now, don't glue the magnet yet!
2. Take your knife and slice off the small rectangles on the weapons/support system where they fit into the arm/shoulder.
3. Now use the drill and drill into the weapons/support system far enough so when you put the magnet in the hole it should sit flush with it.
4. Put in the magnet but don't glue it yet.
5. Place the weapon on the arm/shoulder so the magnet should connect together and automatically align to the opposite poles (these are strong magnets!).
6. Repeat the process for each arm/shoulder so that all weapons have the same magnetic alignment. This just means you freely swap the weapons from left to right.
7. Once you have ensured that magnets are correctly oriented, use a small drop of glue in the arm/should to secure the magnet.
8. Make yourself a cup of tea for a job well done