Stern Defense SD .40SW AR-15 Barrel 4" Threaded Black

Stern Defense SD .40SW AR-15 Barrel 4in .578-28 TPI 1-16 Twist Rate Black BR4IN-D1-M. 40S&W barrels are ideal for gun lovers who want to build their own custom dedicated .40S&W AR15 upper group. Machined to tight tolerances with quality as a top priority you can't go wrong with the SD .40 cal barrel. Specifications for Stern Defense SD .40SW AR-15 Barrel Threaded: Manufacturer: Stern Defense Color: Black Fabric/Material: 4150 Chrome-molly Steel Caliber: .40 S&W Barrel Profile: Light Weight Barrel Twist Rate: 1-16 Gun Make: AR Platform Gun Model: AR-15 Firearms Threads Per Inch: .578x28 Package Contents: Stern Defense SD .40SW AR-15 Barrel Threaded What firearm models does the manufacturer say Stern Defense SD .40SW AR-15 Barrel Threaded is compatible with? The manufacturer suggests that Stern Defense SD .40SW AR-15 Barrel Threaded is compatible with AR-15Stern Defense 006-40SW BR4IN-D1-M: SD .40SW AR-15 Barrel 4in .578-28 TPI 1-16 Twist Rate Black