This is the new barrel system from Inception Designs called the Stella Barrel. This comes in Autococker thread and is absolutly amazing. The kit contains 5 backs, 3 fronts, and two tips. The barrel length is only affected by the size of the tip that you choose! You get both the 14′ and 16′ tip in this kit. This barrel takes all of the innovations of the insert barrels and improves on it. With traditional insert systems each insert is custom fitted so that you can match your paint perfectly everytime. This system has no insert, as each back is custom fitted to the size you need. Now for the first time you can also have a kit that has fitted fronts! Now that Inception has created this new fitted front system, accuracy is greatly increased from 100 feet+. The pressure created in the old style insert system can cause you to miss your target by 3 inches in any direction from 100 feet with a perfect shot. The Stella creates a way thru its patented porting system and fitted design that gets rid of that error, and lets you hit the target you are aiming at more frequently. This is without a doubt the best barrel that we have ever tried. Get yours today!