With the corrosive environment I doubt that a fail safe device could be made that would survive all levels of operation given that not everyone takes the same care of their rifle. It would also be another potential item that could backfire and cause some injury to someone even though it might be lessthan what might be experienced with a complete barrel failure. I suspect that if we knew the real numbers of barrels that have ruptured based on the number of barrels that are out there the numbers would be very low.