Rosco Manufacturing K9 16in Barrel & Hatchet 5.56 NATO Barrel Black. The K9 continuous taper is the most effective profile to dissipate heat from hard use. With weight shifted to the back of the barrel modern attachments on the front of the rifle create a perfectly balanced and better handling rifle. Updated target crown carried over from the Purebred series. Features improved harmonics fit and finish. Specifications for Rosco Manufacturing K9 16in Barrel & Hatchet 5.56 NATO Barrel: Manufacturer: Rosco Manufacturing Color: Black Finish: Nitride Fabric/Material: 416R Steel Caliber: 5.56x45mm NATO Barrel Length: 16 in Barrel Profile: Continuous Taper Gas System Length: Intermediate Threads per Inch: 1/2x28 Barrel Twist Rate: 1-7 Gun Make: Kahr Arms Gun Model: Kahr Arms K9 Weight: 34.5 oz Country of Origin: USA Package Contents: Rosco Manufacturing K9 16in Barrel & Hatchet 5.56 NATO Barrel Intermediate Gas Tube What firearm models does the manufacturer say Rosco Manufacturing K9 16in Barrel & Hatchet 5.56 NATO Barrel is compatible with? The manufacturer says that Rosco Manufacturing K9 16in Barrel & Hatchet 5.56 NATO Barrel is compatible with Kahr Arms K9Rosco Manufacturing K9-16-HY-556-7-I: K9 16in Barrel & Hatchet 5.56 NATO Barrel Black