Battle Arms Development BATTLEARMS Lightweight 16in 9x19mm 4140 Barrel. Warning: Do not use 5.56 flash hiders or .223 muzzle devices with this barrel. Specifications for Battle Arms Development Lightweight 16in Barrel: Manufacturer: Battle Arms Development Color: Black Finish: Nitride Fabric/Material: 4140 Steel Caliber: 9mm Luger Barrel Length: 16 in Barrel Profile: Light Threads per Inch: 1/2x36 Barrel Twist Rate: 1-10 Barrel Material: 4140 Steel Flutes: Yes Gun Make: Universal Gun Model: Universal Weight: 1.475 lb Package Contents: Battle Arms Development Lightweight 16in Barrel What firearm models does the manufacturer say Battle Arms Development Lightweight 16in Barrel is compatible with? The manufacturer suggests that Battle Arms Development Lightweight 16in Barrel is compatible with UniversalBattle Arms Development A-BBL16T9MM1/10BN: BATTLEARMS Lightweight 16in 9x19mm 4140 Barrel