They were short lived. There were a couple versions. I don't have specifics but the first ones had an issue with the chamber. After an undetermined number of rounds in the thousands you'd get a failure that would blow out the mag. After that, there was a redesign of the chamber and they sold those for a bit. Shortly after that they pulled them off the site and said they needed to do some more testing. They kind of stopped talking about them after that.
I've got a 10.5 mini and a 16" standard that get shot regularly but not anything more than a couple of mags per range session. I've not had any issues with them. I've got a fes other barrels. One came direct from RA. The others were with rifles I found on GB. I don't have an easy way to tell which version is which. They did make bolts in Type 2. No idea on how many barrels/bolts they actually made.