F Ballistic Advantage Premium Series, DMR Profile Barrel, 6MM ARC, Fits AR10, 20 in Threaded Barrel, 5/8x24 in Thread Pitch, 1:7 in Barrel Twist, Rifle-Length Gas System, Bead Blasted Stainless Steel Finish, Silver BABL6MM003P MAP BABL6MM003P show more like this lat rate starting at $11.99 Hinterland Outfitters F Ballistic Advantage Premium Series AR-15 20" 6MM ARC DMR Barrel Rifle Length Gas System 1:7 Twist 416R SS - BABL6MM003P $251.75 BABL6MM003P show more like this Calculated in Cart Classic Firearms