Upgrade your AR-15 pistol platform with the Stern Defense 4" 9mm Barrel. This precision-engineered barrel is designed to deliver exceptional accuracy and performance in an ultra-compact package. Crafted from 4150 chrome-moly steel with a durable melonite coating, it offers excellent corrosion resistance and longevity. The 1:10 twist rate provides optimal stabilization for 9mm projectiles, ensuring consistent accuracy. The barrel's compact size makes it ideal for close-quarters situations and concealed carry applications. Every Stern Defense barrel features a deeper machined throat for a longer free bore, accommodating bullets with longer ogives and preventing potential malfunctions.

Features and Specifications:

• Caliber: 9mm

• Barrel Length: 4"

• Material: 4150 Chrome-moly steel

• Finish: Melonite coating

• Twist Rate: 1:10

• Muzzle Thread: 1/2-36

• Includes: Locating pin installed

• Weight: Approximately 0.8 lbs (estimated)

• Compatible with mil-spec AR-15 upper receivers

• Deeper machined throat for improved reliability

• Made in the USA