Ballistic Advantage SPR Rifle Premium Series 6.5 Grendel AR Barrel 5/8x24 Gray 18 in. 5 Grendel AR Rifle Threaded Barrel. These AR15 Barrels by Ballistic Advantage boast a shoulder-less design that symmetrically limits barrel whip and allows the barrel to quickly return to its home position. In doing so it is much easier to land follow-up shots with a high rate of fire. Another fantastic feature of the Ballistic Advantage Hanson Series AR Barrel is that it has a QPQ corrosion resistant finish which will preserve the quality of your barrel and rifle for significantly longer than stock options. Upgrade your firearm with the Ballistic Advantage Premium Series QPQ Coated Rifle Barrel today to experience the power of premium. Specifications for Ballistic Advantage Premium Series 6.5mm Grendel II Hanson Threaded Barrel: Manufacturer: Ballistic Advantage Color: Gray Finish: Bead Blasted Caliber: 6.5mm Grendel Gas Block Journal Size-Diameter: .750 in Threads per Inch: 5/8x24 Barrel Twist Rate: 1-8 Flutes: No Gun Make: AR Platform Gun Model: AR-15 Country of Origin: USA Package Contents: Ballistic Advantage Premium Series 6.5mm Grendel II Hanson Threaded Barrel What firearm models does the manufacturer say Ballistic Advantage Premium Series 6.5mm Grendel II Hanson Threaded Barrel is compatible with? The manufacturer says that Ballistic Advantage Premium Series 6.5mm Grendel II Hanson Threaded Barrel is compatible with AR-15Ballistic Advantage BABL65G003P: SPR Rifle Premium Series 6.5 Grendel AR Barrel 5/8x24 Gray 18 in