Paintball Barrel Threading

I been playing paintball since 2004. Barrels can be changed, upgraded, swapped if using the same threading or an adapter. I had to learn this the hard way sort to say because I bought a marker (paintball gun) a couple years ago without a barrel and in my hunt for a barrel I purchased the wrong threaded barrel. A barrel's threading is the end where it screws into the marker. The part of the barrel that screws into the marker comes in different sizes or different shaping depending on the marker, meaning not all markers have the same threading. This is what I know about Paintball Barrel Threading:

Autococker threading is one of the most popular used by the Planet Eclipse Ego(s), Planet Eclipse Geo(s), Empire Axe, Empire Invert Mini, Dangerous Power series and other markers.

---DLX Luxe markers have it's own threading and is not Autococker
---Tippman markers have it's own threading and is not Autococker
---Angel markers have it's own threading and is not Autococker
---Spyder markers have it's own threading and is not Autococker

---You can buy an adapter to use an Angel threaded barrel on an Autococker marker, per say maybe because you really like that Angel barrel.

---Inserts: inserts change the bore size of the barrel, smaller/larger due to the bases on temperature/humidity and basic size of balls being shot. You don't need Physics class to understand this concept. Just think about a projectile shooting out of a tighter or looser valve.
     -----The Stiffi barrels cant fit Inserts, you have to buy the Stiffi Switch, it has different twist on and off threading
     -----Carbon Fiber is the way to go, another popular one is the Deadly Wind
     -----Not all barrels will take inserts