How to shortened the Benelli M4 stock

Hello,

I recently purchased a Benelli M4 with pistol grip. After I went to the shooting range and I felt the stock is too long for me. My first question is that legal to shortened the stock in California? The overall length is 40" and the barrel is 18.5", and I checked online and it says as long as the overall length is not under 26" that will be legal. So my second questions is if it is legal which short stock should I use? Any recommendations?

Please help.

Thanks

I didn't find the right solution from the Internet.



References:

www.calguns.net/calgunforum/showthread.php?t=1407127

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