Reason why you should buy a Rapid.
They are simple to work on.
Reason why you should not buy a Rapid.
They are simple to work on, so every man and possibly his dog too have had a go at "improving" it. Finding an unmolested one is hard. Finding an unmolested one in legal limits seems to be harder, I speak from experience here, bought a later model mark 1 with anti tamper on that was running at 14 ft lb with the anti tamper block still in place!
I would definitely keep the 100 as my sub 12 and get a mk2 Fac rapid in that case then. Get on the rapid forum. I like The MFR with the shrouded barrel but your limited to a 240cc bottle which isn't massive for FAC levels so I'd get a straight up mk2. Then the world is your oyster in terms of any mods etc.
If you then find you don't use the 100 then flog it. I would of loved a 100 as my FAC rifle but jut heard a lot of bad things accuracy wise (I could have lived with the low shot count and relatively low 26ft/lbs).
Looks like I'm just going to get a mk2 and sell the Hw 100. Cheers for the advice lad.