Ballistic Advantage Premium Series Threaded Barrel 6.5mm Grendel II 20in DMR Rifle 1-8 Twist 5/8x24 Thread Bead Blasted Stainless Steel BABL65G004P. 5 Grendel AR Rifle Threaded Barrel. These AR15 Barrels by Ballistic Advantage boast a shoulder-less...