Factbox-A look at proposed US state laws to curb new gun merchant code

(Reuters) – Republican-backed bills introduced in legislatures in several U.S. states target the use of a planned merchant code for credit card transactions at gun retailers that is intended to detect suspicious firearms and ammunition sales. Major credit and debit card companies have committed to using the “merchant category code” for gun sellers, a development welcomed by gun control advocates who call it an important new tool for investigating suspicious purchases. Critics have said the code could be used to improperly track legal purchases of guns and ammunition. Here is a look at bills in…

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