Rosco K9 Features The Rosco Manufacturing K9 barrel runs a mid length gas system paired with an optimized gas port giving the rifle reliable cycling whether it is run suppressed or bare. Its continuous taper profile is designed to dissipate heat more effectively than a traditional step contour which matters during extended strings of fire or rapid follow up shots. The barrel is machined from Stainless Steel with a durable Nitride finish delivering corrosion resistance and smooth function without sacrificing accuracy. A 1:7 twist rate stabilizes a wide range of 5.56 NATO bullet weights making the K9 versatile across both lightweight and heavier loads. Rosco shifted the barrel s weight toward the rear of the 13.95 inch length which keeps the rifle balanced once a suppressor or muzzle device is added up front resulting in better handling characteristics for the shooter. The updated target crown carried over from Rosco s Purebred series protects the crown from damage while supporting consistent accuracy shot after shot. Rosco eliminated 90 degree cuts across the design improving both harmonics and overall fit and finish. Threaded 1/2x28 the K9 barrel is available for sale at GrabAGun for AR builders chasing a better balanced accuracy focused upgrade. Rosco K9 Specifications Manufacturer: Rosco Model: K9 Caliber: 5.56 NATO Material: Stainless Steel Finish: Nitride Twist Rate: 1:7 Barrel Length: 13.95 Thread Pitch: 1/2x28 Weight: 29.8 oz Gas System: Mid Length Available At: GrabAGun