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yes it threaded size M9x. 75 BRAND: American Tactical Imports MODEL: Firefly SAFETY: Manual Safety TYPE: Pistol: Semi-Auto SIGHTS: Adjustable Rear Sight CALIBER: 22LR BARREL: 3.9 Threaded Barrel FINISH: Blue OVERALL LENGTH: 7.2 ACTION: Double Action WEIGHT: 24.6 STOCK: Black Grips CAPACITY: 10+1 FEATURES: Polymer Frame, Integrated Accessory Rail FEATURES: Fixed Barrel RECEIVER: Black Country of Manufacture United States License Requirement FFL Manufacturer ATI Mfg. Part Number GERG2210TFF UPC 813393019685 Caliber/Gauge .22 LR Action Semi Automatic Thre

Yes, this pistol has a 4" threaded barrel (M9 x .75 pitch) Terry. You can use a thread adapter to 1/2x28 for more suppressor choices. Example : https://hughesprecision.com/product/hughes-precision-sig-mosquito-thread-adapter-12-28-wfluted-thread-protector/

Hi Terry, Yes the Firefly comes with a 4" threaded barrel (M9 x .75 pitch). You can use a thread adapter to 1/2x28 for more suppressor choices. Example : https://hughesprecision.com/product/hughes-precision-sig-mosquito-thread-adapter-12-28-wfluted-thread-protector/

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