The Stern Defense 9mm AR-15 Barrel (brand part no. 006-9MM BARREL 4 INCH-D1-M) is a 4-inch, 9mm Luger barrel machined from 4150 chrome-moly steel and finished in black Melonite for corrosion and wear resistance. Stern Defense cuts a 1:10 rate of twist into the bore and threads the muzzle 1/2-36 for a compensator, thread protector, or compatible suppressor mount, making this a straightforward drop-in for a 9mm AR pistol or PCC build. It ships with no sights, so a shooter can run whatever optic or iron sight setup suits the build. It is made in the U.S.A.

Key Specifications

• Chambered in 9mm Luger.
• Barrel length of 4 inches.
• Machined from 4150 chrome-moly steel.
• Finished in black Melonite coating for corrosion and wear resistance.
• 1:10 rate of twist.
• Muzzle threaded 1/2-36 for a compensator, protector, or compatible mount.
• Ships with no sights installed.
• Made in the U.S.A.

Frequently Asked Questions

What caliber is this barrel chambered in? 9mm Luger.

What thread pitch is the muzzle? 1/2-36.

Does this barrel come with sights? No, it ships without sights so you can run your own optic or iron sight setup.

Buy the Stern Defense 9mm AR-15 Barrel

Finish a 9mm AR pistol or PCC build with a genuine chrome-moly, Melonite-coated barrel. Order it from our AR15 barrels selection at our Lubbock, Texas gun shop for fast, direct shipping.