The main difference that rage told me to look for, was when you get your broadheads the package should be heat sealed. Mine came in actual packaging, but the edges had never been sealed. It would just open without having to cut it open. Also if you look at the section just above the threads. On a legitimate rage hypodermic there is just one section before you get to the shock collar. On the counterfeit there is an extra ridge in this smooth area before the shock collar.