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No, this is a .30 caliber brake so both the threads and muzzle diameter are not correct for 9mm.

NO, will NOT FIT PC Carbine 9mm. This is a .30 caliber brake. GET PC Carbine brake HERE ( https://www.mcarbo.com/ruger-pc-carbine-muzzle-brake.aspx ) I hope this helps

Rod, sorry no. Fits all Ruger Precision® Rifle calibers (308 Win, 6.5 Creedmoor and 243 Win) Threads: 5/8-24. Here's one that will work >>>> https://www.mcarbo.com/ruger-pc-carbine-muzzle-brake.aspx

Rod, no Sir, the Ruger PC Carbine has 1/2"-28 threads and this brake has 5/8-24 threads. This will fit and is made specifically for the Ruger PC Carbine : -- https://www.mcarbo.com/ruger-pc-carbine-muzzle-brake.aspx

No sir, different thread pattern, and different size inner diameter. These will work though https://taccom3g.com/product/ulw-9mm-muzzle-break/ ----------- https://www.tandemkross.com/Game-Changer-PRO-9mm-Compensator-for-Ruger%C2%AE-PC-Carbine%E2%84%A2-and-other-9mm-Firearms_p_512.html ----------