Looking to build a compact and reliable 9mm AR pistol or SBR? This AR9 4.5″ barrel is the core component you need for a lightweight, maneuverable build. Designed for the popular 9mm AR-15 platform, this barrel from Miami Shooters Supply delivers exceptional accuracy with a fast 1:10 twist rate, all while being crafted from durable 416 stainless steel. It’s the perfect upgrade for builders who prioritize quality and performance in their AR-15 parts selection.
Key Features
- 4.5-inch length ideal for ultra-compact pistol or SBR builds.
- Precision 1:10 twist rate optimized for stabilizing a wide range of 9mm bullet weights.
- Machined from solid 416 stainless steel for longevity and consistent accuracy.
- Threaded 1/2×36 muzzle allows for direct attachment of common 9mm muzzle devices or suppressors.
- Dark Earth finish provides a durable, corrosion-resistant coating and a popular modern aesthetic.
- Chambered in 9x19mm (9mm Luger) for widespread ammunition compatibility.
Built For
This barrel is built for the practical shooter and dedicated builder assembling a home defense firearm, a truck gun, or a fun range pistol. Its short 4.5″ profile makes it an excellent choice for a legally configured AR pistol, offering superior handling in tight spaces without sacrificing the ballistic efficiency of the 9mm cartridge.
Specifications
- Caliber: 9x19mm (9mm Luger)
- Material: 416 Stainless Steel with Dark Earth Finish
- Length: 4.5 Inches
- Twist Rate: 1:10
- Muzzle Thread: 1/2″x36 TPI
- Compatibility: Designed for standard AR-9/AR-15 9mm platforms; verify compatibility with your specific upper receiver and bolt carrier group.
FAQ
Will this barrel work with my Glock-magazine lower receiver?
This AR9 barrel is designed for use with a dedicated 9mm upper receiver. Compatibility with Glock or Colt-style lower receivers depends on your upper receiver and bolt choice, not the barrel itself. Always confirm your parts list for a functional build.
What type of muzzle device can I use?
The 1/2×36 thread pattern is standard for many 9mm compensators, flash hiders, and linear compensators. Ensure any suppressor you attach is rated for 9mm and a 4.5″ barrel length.
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