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<p>It seems that in this case that he was not illegally allowed to own a gun based on his involuntary commitment to a mental health institution. So not sure if this a law issue or enforcement issue.</p>
<p>The broader ownership issues are a hodgepodge.</p>
<p>For example, it is illegal and a felony in California to own a nunchuck or a tonfa.</p>
<p>(nunchucks - two sticks attached by a rope - seen in martial arts movies)
(tonfa - a stick with another stick coming out a 90 degree angle - think of it as an “L”)</p>