Step 4: how an inline clip works
An inline clip is kid of like an RSCB clip but its IN-LINE (wow). When the baster is fired, the air goes through the PVC and around the dart because theres room around the dart and then the air pushes the dart out the barrel like a regular barrel. While the first dart is being fired, the next dart is carried into the barrel so it can be shot the next time the gun is fired.
If is not a good explanation, please ask me to edit this and make it better.