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If it has the standard 1/2"×28 thread pitch, yes.

Would recommend not following the previous answer, the opening in the brake is for .223/5.56 so while the threads will fit, it would only work for one shot before it's sent flying down range. Here's a somewhat similar option in the same price range for 9mm: https://www.budsgunshop.com/product_info.php/products_id/104647/silencerco+ac2628+asr+single+port+9mm+luger+muzzle+brake+1+2-28+tpi+black+steel

Hi Steve, it will fit, but you do not want to put it on a 9mm PCC. This is for 5.56. For the Ruger PC Carbine, I recommend the M*Carbo Ruger PC Carbine Muzzle Brake >>> https://www.mcarbo.com/ruger-pc-carbine-muzzle-brake.aspx Stay safe & have a great day!

Trevor is correct!! It was getting late & me being tired, I wasn't thinking. So Sorry!

Hi Steve and welcome. The bore diameter is not the right caliber so, no. A suitable option is here : https://www.budsgunshop.com/product_info.php/products_id/718014545/2bo-s+short+muzzle+brake ----- Cheers, stay safe and enjoy!