Originally Posted by bronko22000

They shouldn't open before the shot or in flight. I would suspect the O-ring can be rotated to a new position. I've never used them but I think the blades have a sort of hook that goes behind the O-ring. If the blade is deployed it could damage the O-ring. So slightly rotating it and pulling it down below the groove prior to positioning the blades should hold the blades in place until impact.