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The orange tip in the USA is only for importing/shipping, and is for the manufacturers. It must be 6mm minimum width, permanatly attached, and be a certain color. There is no federal law against removing it, however some states, and several cities require the orange tip to remain unaltered, in order to avoid confusion. In CO for example, it is completely legal to remove, cover, or alter the tip in anyway. You can see it under 15 USC 1150 and 15 CFR 1150.