here, i found this on their site:
-"Conversion Adaptors are named so that the first name listed is the gun that the adaptor will fit in, and the second name is what barrel will work in it. Example: The "A5/X7 to Autococker iFit Adaptor" will allow you to use Autococker Barrels on your A5/X7. "
so if you bought an A5 to autococker kit, you would thread the adapter into your gun, and then you could thread any autococker threaded barrel into the adapter.
on a side note i really suggest getting the a5 to cocker' threaded kit. cocker' threads are what most other guns use so they are very common which makes it easy to find any brand of barrel with cocker threads.
your not looking for "a5 to furious/deadly wind". your looking for "a5 to autococker". then you would just buy an autococker threaded furious or deadly winds barrel, or any other cocker threaded barrel of your choice.
2nd note....your not seeing a5 to deadly winds fibur because the fibur barrel takes freak inserts. so if you used the ifit kit youd have the adapter with an insert in it, then the barrel attached to the kit with the freak insert in it...which would be pretty pointless to plug a barrel kit into another barrel kit lol.
however im pretty sure DW makes another carbon fiber barrel that doesnt take inserts so it would work just fine. btw the fibur is a 1 piece barrel, but with the freak kit it works like a 2 piece. its all 1 piece but the inside of the back half is big enough for the freak inserts. i have one and ive been very pleased with it. ive also had the pleasure of actually playing with the guys from TechT on a regular basis and they are pretty cool people. their products get tested in the real world by real people at the pb field every weekend, i wouldnt have any reservations about any of their products.