sold by Beretta-USA only as a "SBR", and all NFA rules apply to it, as its short barrel length restricts its civilian availability as a "Short Barreled Rifle" (any rifle with a barrel length less than 16 inches as described in the NFA Title 2), a category of firearms which is forbidden to own in certain States and that requires a BATFE Form 4 to be filed and a payment of $200.00. The strict regulations of the National Firearms Act are compounded by the Gun Control Act of 1968, which prohibits the importation of such firearms, on the auspicies that they are not particularly suitable for or readily adaptable to sporting purposes. 5.56×45mm NATO semi-automatic rifles MR1 Carbines