Stern Defense AR-15 Barrel Features The Stern Defense AR-15 Barrel is machined from 4150 chrome moly steel a material known for its strength and heat resistance under sustained firing making it a solid foundation for a 9mm AR build. A 1:10 twist rate is matched to common 9mm bullet weights helping stabilize the round for consistent accuracy at typical carbine distances. At 6 inches long this barrel suits a compact pistol caliber carbine build where a short maneuverable platform is the priority. The Melonite coating applied to the barrel adds corrosion resistance and reduces friction which can help with smoother cycling and easier cleaning over time. Threaded at 1/2x36 the barrel is ready to accept a compatible 9mm muzzle device such as a compensator or suppressor adapter giving builders flexibility in configuring the rest of the build. Made in the USA the barrel reflects a domestic manufacturing standard that many builders look for in a core component like a barrel. Finished in Black it matches the typical finish of most AR-15 pistol caliber builds without requiring additional coordination with other parts. For builders assembling or upgrading a 9mm AR-15 platform the Stern Defense 6 inch barrel is available for sale at GrabAGun. Stern Defense AR-15 Barrel Specifications Manufacturer: Stern Defense Model: AR-15 Barrel Caliber: 9mm Barrel Length: 6 Twist Rate: 1:10 Material: 4150 Chrome-Moly Steel Finish: Melonite Color: Black Thread Pattern: 1/2x36 Available At: GrabAGun