There is currently a petition to repeal the National Firearms Act of 1934. Here is the link:

https://petitions.whitehouse.gov/petition/repeal-nfa

Look around there are also many other very good petitions to sign.

The NFA was originally enacted in 1934. Similar to the current NFA, the original Act imposed a tax on the making and transfer of firearms defined by the Act, as well as a special (occupational) tax on persons and entities engaged in the business of importing, manufacturing, and dealing in NFA firearms. The law also required the registration of all NFA firearms with the Secretary of the Treasury. Firearms subject to the 1934 Act included shotguns and rifles having barrels less than 18 inches in length, certain firearms described as “any other weapons,” machineguns, and firearm mufflers and silencers.