For the 223 you will need either a LA .378 bolt head, or the Adapter from SSS and a standard SA .378 bolt head. The firing pin should work, but if you go the adapter route you'll have to take off the adapter and put on the regular unit which may require setting pin protrusion each time.
If you are going to use the adapter system, it may be more adventageous to just get a 2nd entire bolt setup for a .378, or have a 2nd firing pin assembly set up with the adapter to ease the conversion each time.
Can't speak of exactly what need to be done to use CF mags in a SF action, but I am sure someone with some experience on that conversion will chime in.
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