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 military-contour SMG barrel, a smooth-sided bolt (numbered to match the receiver), an unmarked receiver cover with ratcheting cocking handle, and a full auto trigger group with "A R S" markings. The grips are ribbed, and it has steel folding stock and a green nylon sling. A shipping box is included, along with a manual and a loading tool.