Manufactured using a South African-made Vector Arms UZI as the base, the HR 4332 was among the final generation of fully transferrable American machine guns, manufactured shortly before the Firearm Owners Protection Act (aka House Resolution 4332) went into effect making it among the last fully transferrable machine guns manufactured in the United States. The receiver is devoid of the barrel ring and bolt block that would normally prevent installation of military configuration components, and the item is currently fitted with a ported SMG barrel, smooth-sided bolt, ratcheting cocking handle, and a full auto trigger group with "A R S" markings. The left side of the receiver has both the Vector and Group Industries markings The grips are ribbed, and it has steel folding stock and a black nylon sling. With two canvas web magazine pouches and five extra magazines.