From the pictures you can see the difference in arrow diamater. The insert is actually recessed into the shaft. Its a sweet shooting bow. I don't think that anything of more money would be any better really. It shoots all of 290 fps, smooth, and just a dream to shoot. The SABO sight was interesting, took a second to convince the guy behind the counter that it was what I wanted. After dialing it in, it is really the only sight I will ever have again. Instant feedback on youyr shooting form. The arrows are the new Easton Axis micro 400 spine arrows. Have nothing to say anything bad about them, except for you need special broadheads for them, or adapter rings. Which I found out the hard way. What you guys think?