I discussed this problem with one of NAP's engineers yesterday. The first order of Bloodrunners NAP recieved didn't have "loc-tight" applied to the small screws. This has cause some of the screws to come un-screwed easily.

All current and future Bloodrunners won't have this problem. If you got one of those early broadheads, give NAP a call, I'm certain they will take care of you!