I can see it now, a smaller version of those door knob covers for child proofing your home.
Chain, I don't see you having a problem. If you do, you can blame it on me I don't mind.
Is there any reason you couldn't have an open top (convertible) scabbard made? Short of a horse rolling over on your rifle what else could you do to your scope that a NF wouldn't already hold up to.
light bulbIf all else fails you could grind the knobby things off your turrets. Then you'd need vise grips to dial a shot.