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Hi Vicheth, yes this has a threaded barrel. Stay safe & have a great day!

Hi Vicheth and welcome. The barrel is threaded (non-conventional) and you will need this adapter to use 1/2 x 28 muzzle devices: -- https://www.taylor-tactical-supply.com/sig-gsg-1911-22-thread-adapter-p/gsg1911-hp-thread-adpt.htm ---------- Cheers and stay safe!