Okay, so before buying my Apex 2, I knew that the 14" would not fit regularly on my Project Salvo. After watching a YouTube video of a guy doing the same exact thing, it didn't work at all the same way for me. First of all, after moving the barrel tip two notches down to give an extra inch, the tip was wobbly and I knew would break balls very easily. So then I decided I would just use a Dremel and bore out my shroud to fit it. It's working fine, now my problem comes to the threads of the barrel. Nobody in the reviews or anything mentioned this but apparently aftermarket barrels for Tippmann guns tend to not fit very tightly. So to no surprise, my shroud is very loose only when the Apex barrel is inside. It is fully screwed in, the threads are the same, and the barrel ends look almost exactly identical. I can't pinpoint the spot on either barrel that is responsible for making it tight. I posted a picture below in hopes that someone can help me decipher what part I need to modify(again) on my Apex for it to fit tight. My guess is the notch right below the o-ring, but I don't know why. Someone please help me!