Shaw AR-15 6.5 Grendel Threaded Barrel No Flute 18in HBAR Profile 1-8 Twist 5/8-24 Thread Matte Stainless AR15HBSS18GRENT2. Shaw is now proud to offer complete barrels directly to consumers. All AR-15 and AR-10 barrels are machined from 416R stainless...