Section 123A. Notwithstanding any other provision of this chapter, law or regulation to the contrary, it shall be unlawful to sell, purchase, rent, lease or possess a .50 BMG rifle or .50 BMG cartridge. Any person violating this section shall be punished by a fine of not less than $1,000 nor more than $10,000, or by imprisonment for not less than 1 year nor more than 10 years, or by both such fine and imprisonment. For purposes of this section the following words shall have the following meanings:-
".50 BMG cartridge" means a cartridge that is designed and intended to be fired from a center fire rifle and that meets all of the following criteria:
(a) It has an overall length of 5.54 inches from the base to the tip of the bullet.
(b) The bullet diameter for the cartridge is from .510 to, and including, .511 inch.
(c) The case base diameter for the cartridge is from .800 inch to, and including, .804 inch.
(d) The cartridge case length is 3.91 inches.
".50 BMG rifle" means a center fire rifle that can fire a .50 BMG cartridge and is not already an assault weapon or a machinegun. It shall not include any antique firearm, nor any curio or relic as defined in Section 478.11 of Title 27 of the Code of Federal Regulations.