The following tutorial will show you around the part 479 landing page.
27 CFR Part 447
Importation of Arms, Ammunition and Implements of War
27 CFR Part 478
Commerce in Firearms and Ammunition
27 CFR Part 479
Machine Guns, Destructive Devices, and Certain Other Firearms
27 CFR Part 555
Commerce in Explosives
27 CFR Part 646
Contraband Cigarettes
27 CFR Part 771
Rules of Practice in Explosive License and Permit Proceedings
Effective date is the date this part was last amended
All of the provisions of the internal revenue laws not inconsistent with the provisions of 26 U.S.C. Chapter 53 shall be applicable with respect to the taxes imposed by 26 U.S.C. 5801, 5811, and 5821 (see 26 U.S.C. 5846).