Precision-machined stainless steel barrels feature a .223 Wylde chamber that helps maximize the long-range performance of your AR-15 with both .223 Remington and 5.56x45mm NATO ammunition. With 6-groove, 1-7" button rifling for accuracy and M4-type feed ramps for reliable feeding, these barrels help you reach out to distant targets with issued or magazine-length ammunition. The 18" barrels offer the Special Purpose Rifle (SPR) profile designed to optimize accuracy out to 600 meters, and are available with Mid-Length or Rifle-Length gas systems. SDM barrel features a heavy, fluted profile under the handguards, for added strength and rigidity. Threaded muzzle accepts a variety of compensators or flash suppressors.
SPECS: Stainless steel, natural finish. .750" (1.9cm) O.D. at gas port. Barrel extension .999" (2.5cm) O.D. 6-groove, 1-7" rifling. Muzzle threads: Ð…"-28 tpi. 16" Carbine - 2 lbs. 2oz. (963g). 18" Mid-Length/Rifle - 2 lbs. 9oz. (1.1kg).SDM - 2 lbs 1.6 oz.