From my experience, and from what I've read. Sometimes once the heads are shot, and they hit something hard, such as a deer, the screw that holds the blades in get all buggered up. Then you can't take them out. I used the Rages for a few weeks, took 1 doe, and now I'm back to my Tekan II's. I like the way they are builty MUCH better. Built like a tank, just like all the other G5 stuff.