CZ Custom CZ 75 SP-01 Shadow 9mm Luger Non-Threaded Pistol Barrel 4.6 in 1-16 Polished Silver. 550in Length 4.6in - This is the bigger diameter barrel. It will not fit in standard CZ75. The Standard bushing is smaller (0.502in). Measured with barrel installed in pistol breech face to muzzle. Specifications for CZ Custom CZ 75 SP-01 Shadow 9mm Luger Non-Threaded Pistol Barrel: Manufacturer: CZ Custom Color: Silver Finish: Polished Caliber: 9mm Luger Gun Make: CZ Gun Model: CZ 75 Shadow CZ 75 SP-01 Phantom CZ 75 SP-01 Shadow CZ 75 SP-01 Tactical CZ 75 SP-01 Barrel Length: 4.6 in Barrel Material: Stainless Steel Barrel Twist Rate: 1-16 Flutes: No Weight: 3.3 oz Gas Block Journal Size-Diameter: 0.55 in Gun Type: Pistol Features of CZ Custom CZ 75 SP-01 Shadow 9mm Luger Non-Threaded Pistol Barrel Fitting may be required Gunsmith installation recommended on barrels Package Contents: CZ Custom CZ 75 SP-01 Shadow 9mm Luger Non-Threaded Pistol Barrel What firearm models does the manufacturer say CZ Custom CZ 75 SP-01 Shadow 9mm Luger Non-Threaded Pistol Barrel is compatible with? The manufacturer says that CZ Custom CZ 75 SP-01 Shadow 9mm Luger Non-Threaded Pistol Barrel is compatible with CZ 75 SP-01 CZ 75 SP-01 Tactical CZ 75 SP-01 Shadow CZ 75 SP-01 Phantom CZ 75 ShadowCZ Custom 30137: CZ 75 SP-01 Shadow 9mm Luger Non-Threaded Pistol Barrel 4.6 in 1-16 Polished Silver