If you’re building a compact AR-9 pistol or SBR, the barrel is the heart of the system. The AR9 4.5″ 9mm barrel from Miami Shooters Supply is a purpose-built component designed for reliability and close-quarters performance. This 416 stainless steel barrel gives you a durable foundation for a lightweight, maneuverable 9mm AR platform that’s perfect for the range or competition. You get a quality-made AR-15 part that delivers straightforward function without unnecessary complexity.
Key Features
- Machined from 416 stainless steel bar stock for consistent strength and corrosion resistance.
- Short 4.5-inch length optimizes for compact builds and reduces overall weight.
- Standard 1/2×36 thread pattern allows for direct attachment of common 9mm muzzle devices.
- Features a 1:10 twist rate, which is the proven standard for stabilizing a wide range of 9mm bullet weights.
- Designed specifically for the AR-9 platform with proper headspacing for reliable 9x19mm cartridge feeding.
Built For
This barrel is ideal for the builder assembling a dedicated AR-9 pistol for dynamic shooting sports, home defense, or as a compact truck gun. Its short profile is also a top choice for anyone looking to create a highly maneuverable firearm that pairs well with a suppressor.
Specifications
- Caliber: 9mm Luger (9x19mm)
- Material: 416 Stainless Steel
- Length: 4.5 Inches
- Twist Rate: 1:10
- Thread Pitch: 1/2×36
- Finish: “Python” Color/Coat (Consult images for exact finish)
FAQ
Will this barrel work with my Glock magazine lower?
Yes, this AR9 barrel is compatible with lowers designed for Glock-style magazines, as well as other common 9mm lower patterns. It is a standard AR-9 barrel profile.
What type of handguard length should I use with a 4.5″ barrel?
For a flush look, a 4″ to 5″ handguard is typical. If you plan to use a muzzle device or suppressor, choose a slightly longer handguard to tuck it inside, or a shorter one to keep everything exposed.
Reviews
There are no reviews yet.