A coalition of gun groups has filed a lawsuit claiming that Maine's new 72-hour waiting period for firearms purchases is unconstitutional and seeking an injunction stopping its enforcement pending the outcome of the case.

Gun rights advocacy groups in Maine are challenging the state's new 72-hour waiting period for firearm purchases.

A coalition of gun rights groups is suing Maine over a law requiring a three-day waiting period to buy a firearm, arguing that the new requirements violate the Constitution. The lawsuit, filed in U.S.