I had never heard of Unique Alpine before this thread, I'm pretty excited to find out about this. I've ALWAYS wanted a three lug, 60° throw (check!) with controlled feed (check!), AICS mag (check!), controlled ejection (check!) and... a carbon fibre barrel.
So with that in mind, what's the pattern for barrel threading? Or are carbon fibre models available? Or is alternative barrels impossible because of the barrel to receiver mating system?