[/align]go with rocky mountain snypers. they are pretty much the same design but with some very important differences. smaller cutting diameter and they use rubber bands instead of the rubber O ring at the back of the head. the rage heads use more energy to open and have a larger cutting diameter . = less likely to pass through. P.S. I shoot rocky mtn. snyper three blades . I was having a hard time getting replacement blades . I bought rage three blades thinking they were the same head . I registered gor this site when I did a search on rage heads and read the questions posted here. Just trying to keep people from making the same mistake I made.