yes its threaded see *******UPC: 806703913513 MFR#: 91351 Magazine Capacity: 20+1 Magazine Type: Double Stack Polymer Frame: Fiber-reinforced polymer Grips: Polymer, adjustable for reach to trigger Sights: Low-profile fully adjustable aperture and post, 4 rear aperture sizes Barrel: Cold Hammer Forged,********* muzzle threaded 18x1 right-hand and 1/2x28 Weight: 5.0 lbs Safety: Ambidextrous thumb safety Caliber: 9mm Luger Barrel Length: 7.72" Overall Length: 16" The CZ Scorpion EVO 3 S1 Pistol features a blowback-operated semi-auto in 9mm with a short 7¾” barrel. Equipped with our newly designed low-profile sights, its rear sight has four different aperture sizes for everything from close quarters to way out there. The sights ride on an 11” Picatinny rail perfect for mounting optics. This model has *******1/2x28 threads hidden underneath the factory flash-hider, meaning users can fit either 1/2×28 or 18×1 accessories to the muzzle. Also added is a QD sling swivel pocket integrated into the rear sling attachment point. Simple and reliable, the Scorpion not only has ambidextrous controls, its non-reciprocating charging handle is swappable and reach to the trigger is adjustable.