Designed for a 9mm bore, ensuring optimal performance with compatible ammunition; 1.6" overall length, adds approx. 1" to overall barrel length; Weighs just 3.2 oz, making it suitable for competitive shooting without adding significant weight to the firearm; Can be shot comfortably both suppressed and unsuppressed, providing flexibility for different shooting scenarios; Corrosion-resistant Manganese Phosphate finish; Includes Shim Set for barrel timing