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Leonardo, yes this fits 10mm and 40S&W. Both calibers are close enough in size that this magazine can be used for either caliber. This is the exact same magazine that comes with the Pistol. Hope this helps.

Leandro, yes it fits both. I have the 10mm Big Rock and 40S&W double stack and they use the same magazine. Cheers and stay safe!

Yes. 10mm will work!!

Leandro, yes 10mm will work just fine in this magazine. Have a great day!