The standard 9mm 90 Series Compact/Centurion threaded barrel is made of a special blend of carbon steel to ensure durability and safety in the open to slide design of the Beretta 90 Series Pistols. They are extended past the typical 92 Compact barrel length so that items threaded on have enough clearance and engagement to safely and properly function. These barrels are 4.8" in length and are assembled with the gen 3 locking block, a thread protector and O-ring. Features: Caliber: 9mm1/2x28 thread pitchOAL: 4.8" External Finishing: Black Beretta 92x Compact/Centurion 9mm 4.8" 1/2x28 Blued Extended Barrel Assembly JB92CTH