Hi Dave,
AFAIK the bad batch of barrels have been sorted and it wasn't just the 110 some of the 100's during that same production time also got the bad barrel.
As mentioned simply check the thread if it's only half threaded be cautious especialy if buying an old stock new shop item which would probably be rare as the RFD should be aware of the issues.
Or more importantly if buying secondhand 100% check that thread as it's more than likely being sold because the owner couldn't hit a barn door and never bothered to return it.
I quite like them not shot one yet but would definitely consider one.
For now I'm more than happy with my fairly rare HW101 as I need it for singe shot target shooting I don't really need the magazine HW100 version.
If you do get one bud bring it to the bash
HTH
Nick