recently traded for a single shot muzzleloader pistol with a Simmons brand red dot scope mounted on it. I never had a handgun with a scope before. I have no idea how it is supposed to work or even if it is legal for hunting in pa. When I look through the scope all I see is some glass lenses. Guy said the batteries are probably dead. I don't even know how to turn it on if it does turn off and on. Is it worth even messing with or should I take it off?