First off you'll need to find one that was made as a semi auto from the start. If not you'll need to get a demilled parts kit, then an approved semi auto receiver and have it built.
That could get very expensive and i'm not even talking about making it CA compliant, that's just to get one. CA law would be pretty easy to comply with using a grip wrap.
There are 3 kinds of people in this world.
The wise, learn from the mistakes of others.
The smart, learn from their own mistakes.
The others, well......they just never learn.
"Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, almighty God! I know not what course others may take; but as for me, Give Me Liberty, Or Give Me Death!"