§ 4181.
There is hereby imposed upon the sale by the manufacturer, producer, or importer of the following articles a tax equivalent to the specified percent of the price for which so sold:
Articles taxable at 10 percent—
Pistols.
Revolvers.
Articles taxable at 11 percent—
Firearms (other than pistols and revolvers).
Shells, and cartridges.
([Aug. 16, 1954, ch. 736], [68A Stat. 490].)