This AR9 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 16 inch, 4150 chrome moly barrel and has a black nitride finish and is specifically designed for 9mm use while incorporating lock-back function. The upper receiver is a forged M4 flat top upper, allowing you to easily attach rifle scopes and red dot sights to the picatinny rail.
This LOCK-BACK 9mm upper assembly is fitted with a 15″ Keymod rail with generously sized cutouts to permit maximum air circulation around the barrel for faster cooling. This partial upper assembly comes with an Afterburner linear compensator that fitted ont0 1/2×36 barrel threads.
- Type: AR
- Finish Color: Black
- Caliber: 9mm
- Barrel Finish: Nitride
- Barrel Length: 16”
- Twist: 1:10
- Gas System: Carbine
- Muzzle: Afterburner Compensator
- Receiver Material: Aluminum
- Receiver: Mil-Spec, Forward Assist & Dust Cover Installed
- Rail: 15” Keymod
Product Details: AR9 Upper Assembly – 16 Inch / 9mm / 1:10 / Lock-Back / Keymod / 160162
➲ CBC Keymod Handguard
New for 2020, this AR-15 handguard has huge implications in terms of how much you enjoy your shooting experience. Our Keymod handguard offers more than just the accuracy enhancements that come with a free-floating rail. The slim profile is comfortable to grip while still allowing enough room for low profile gas blacks underneath. Our Keymod handguards are leading the firearms industry with cutting edge precision, along with new era innovative deisgns.
The barrel is one of the few components that directly affect the accuracy and weight of your build. Designed for corrosion resistance, this barrel will not let you down. This barrel is machined from 4150 Chrome Moly Steel, heat treated to RC 28-32 hardness, and properly stress relieved. This barrel has a nitride finish for increased strength and durability. It is chambered 9mm chamber, with a 1:10 twist rate. This is the perfect barrel for an AR9 build, keeping weight to an absolute minimum, while still offering a significant ballistic advantage.
➲ Afterburner Compensator
The muzzle device is designed to perform a specific task, like suppress flash intensity or reduce felt recoil. This Afterburner compensator is machined from quality steel and finished with an exceptionally corrosion resistant salt bath nitride for a lifetime of service. It utilizes a linear design to direct the high-pressure gas behind the bullet in a straight line away from the shooter, resulting in a reduction of perceived noise. Due to its six-hole design surrounding the central bore, it provides effective flash suppression that preserves the shooter’s night vision by disrupting the muzzle flash when firing in low lighting conditions.