Build a compact and reliable 9mm AR pistol or SBR with the AR9 4.5″ 9mm barrel from Miami Shooters Supply. This barrel is a core component for anyone assembling a dedicated 9mm AR-15 platform for close-quarters use, training, or competition. Its 4.5-inch length makes for an exceptionally maneuverable firearm, while the 416 stainless steel construction ensures lasting accuracy and durability. We ship fast so you can get your build started without delay.
Key Features
- 4.5-inch length optimized for compact 9mm AR pistol builds and superior maneuverability.
- Chambered in 9x19mm (9mm Luger) for affordable, low-recoil shooting.
- Manufactured from 416 Stainless Steel for consistent performance and corrosion resistance.
- Features a 1:10-inch twist rate, ideal for stabilizing a wide range of 9mm projectile weights.
- Threaded 1/2×36 at the muzzle for direct attachment of suppressors, compensators, or flash hiders.
- Finished in a durable black coating for added protection and a clean, professional look.
Built For
This barrel is the right choice for builders focused on creating a short, handy AR-9 for home defense, vehicle use, or dynamic pistol-caliber carbine matches. It’s also an excellent option for a suppressor host build, keeping overall length manageable when a can is attached. If you need a quality, no-fuss barrel to complete your 9mm AR-15 parts list, this is it.
Specifications
- Caliber: 9x19mm (9mm Luger)
- Material: 416 Stainless Steel with black finish
- Length: 4.5 inches
- Twist Rate: 1:10 inches
- Muzzle Thread: 1/2″x36 TPI
- Platform: Dedicated AR-9 / 9mm AR-15 (requires compatible upper receiver and bolt)
FAQ
Is this barrel compatible with Glock or Colt-style 9mm AR lowers?
This barrel is designed for use with a dedicated 9mm AR-15 upper receiver and bolt carrier group. You must ensure your bolt and upper are compatible with the same magazine type (Glock or Colt) as your lower receiver.
Does this barrel come with a thread protector?
No, a thread protector is not included. You will need to install your own muzzle device or thread protector to cover the 1/2×36 threads.
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