Wassenaar Arrangement Semi-automatic Rifles are a line of rifles sold in the United States by Century International Arms. The rifles are manufactured in Romania by the Cugir Arms Factory and are a semi-automatic variant of the Pistol Mitralieră model 1963/1965, a Romanian licensed derivative of the Soviet AKM assault rifle. Century imports them and modifies them in order to comply with national legislation before sale to the general public via licensed traders. The WASR series takes its name from the 1996 Wassenaar Arrangement, a multilateral export control regime to monitor and limit the proliferation of certain conventional weapons and dual-use technologies.

The Pistol Mitralieră model 1963/1965 is a Romanian 7.62x39mm assault rifle. Developed in the late 1950s, the PM md. 63 was a derivative of the Soviet AKM produced under license. It was the standard issue infantry weapon of the Army of the Socialist Republic of Romania until the late 1980s, after which it was gradually superseded by the Pușcă Automată model 1986, a derivative of the Soviet AK-74.