You're not bulletproof...

ATF

a-person-wearing-a-trench-coat said: You can modify it to shoot all four at once though. Doesn’t seem to be too hard to do.

In regards to the “COP .357 Derringer” post…

While it probably can be done, I HIGHLY ADVISE AGAINST IT… (I’m all for the 2nd Amendment and some laws I don’t agree with but nonetheless I follow them. In today’s news ironically, the Federal Government has increased wiretapping and electronic eavesdropping. http://www.publiusforum.com/2012/10/01/aclu-obama-has-quadrupled-warrantless-wiretaps/)

ATF Ruling 81-4

Any weapon which shoots automatically, more than 1 shot, without manual reloading, by a single function of the trigger, is a machine gun as defined in 26 U.S.C. 5845(b), the National Firearms Act (NFA). In addition, the definition of machine gun also includes any combination of parts from which a
machine gun may be assembled, if such parts are in possession or under the control of a person. An AR-15 type assault rifle which fires more than one shot by a single function o the trigger is a machine gun under the NFA. Any machine gun is subject to the NFA and the possession of an unregistered machine gun could the possessor to criminal prosecution.

http://www.atf.gov/publications/download/p/atf-p-5320-8/atf-p-5320-8-appendix-b.pdf

Penalty / Punishment

Violations of the Act are punishable by up to 10 years in federal prison and forfeiture of all devices or firearms in violation, and the individual’s right to own or possess firearms in the future. The Act provides for a penalty of $10,000 for certain violations. A willful attempt to evade or defeat a tax imposed by the Act is a felony punishable by up to five years in prison and a $100,000 fine ($500,000 in the case of a corporation or trust), under the general tax evasion statute^. For an individual, the felony fine of $100,000 for tax evasion could be increased to $250,000.