Shaw AR-15 5.56 NATO Threaded AR Barrel 16.5in Lightweight Mid 1-8 Twist Nitride Black. 56 NATO HBar Straight Fluted Barrel is a durable target profile barrel that delivers even greater strength than the target contour barrels offered by most Rifle Scope manufacturers. These Rifle Barrels by Shaw are constructed from rugged 416R stainless steel is rated for mid-cartridge strength and has an H-barrel profile to give you better control of your projectile as it feeds. This Shaw 5.56 NATO 18" HBar Straight Fluted Barrel has a 1:7 twist rate for faster longer-lasting takedowns and an 11-degree target crown to keep you on target at any range. When you need a new barrel for your favorite rifle pick up this Shaw 5.56 NATO 416R Stainless Steel Barrel today. Specifications for Shaw AR-15 5.56 NATO Threaded AR Barrel: Manufacturer: Shaw Fabric/Material: Stainless Steel Caliber: 5.56x45mm NATO Gas Block Journal Size-Diameter: .750 in Barrel Material: 416R Stainless Steel Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Firearms Threads Per Inch: 1/2x28 Package Contents: Shaw AR-15 5.56 NATO Threaded AR Barrel What firearm models does the manufacturer say Shaw AR-15 5.56 NATO Threaded AR Barrel is compatible with? The manufacturer says that Shaw AR-15 5.56 NATO Threaded AR Barrel is compatible with AR-15Shaw AR15MWCMN16NATO9: AR-15 5.56 NATO Threaded Barrel 16.5in Lightweight Mid 1-8 Twist Nitride Black