Blank-firing guns in the USA.

Hello! I have a simple question about blank-firing guns in the USA. I’ve noticed that some blank guns pictured on websites like “by the sword” and “replica weaponry” have orange tips for safety and some don’t (varying by picture). My question is whether or not it is optional to receive the orange barrel-tip or if all blank-firing guns in the USA will come with an orange tip by default. Thanks!