I have seen what rages do and they make for good blood trails,but I have some NAP mecks and I shot one goofing around and kinda glad it wasn't at anything I meant to take.The o-ring went back as designed but only 1 of 3 blades deployed.I thought the Muzzy heads at Wally World were MX3's? I shoot some that are older...not marked MX 3 and have total faith in them and they shoot like a dream,also have Phantoms...those are my goto arrows.Try the heads on different shaft and see if that changes things.