Sons Of Liberty Gun Works Broadsword-89 6Mm Arc 14.5'' Bbl 13'' M89 Rail W/Nox

The Sons of Liberty Gun Works Broadsword-89 upper receiver in 6mm ARC with a 14.5" barrel and 13" M89 rail is purpose-built for shooters who demand rock-solid accuracy and minimal point-of-impact shift under field conditions. This upper receiver integrates seamlessly with M89/L89 handguards through precision relief cuts on the receiver face, creating a lockup so stout that bipod and barricade loading have virtually no effect on zero. If you're running a precision rifle build, a competition setup, or a tactical rifle that sees real-world use, the Broadsword-89 engineering addresses the flex and movement that plague standard forged receivers.

SOLGW's design philosophy here centers on rigidity where it matters most. The upper receiver is substantially reinforced along its entire profile to stiffen the barrel-to-optics interface—the path your accuracy lives on. That reinforcement translates directly to tighter groups and more predictable performance, especially when you're pushing the gun hard. The 6mm ARC chambering brings efficient, flat-shooting ballistics in a package that works equally well at 100 yards or 500. Paired with a SOLGW Precision Rifle Barrel, you're starting from a platform that's been proven to deliver top-tier accuracy and repeatability.

The ergonomic touches matter too. The forward-shifted Forward Assist gives you extra clearance for left-hand charging handle manipulation—a detail that screams attention to how real shooters work their rifles. Combined with the included Nox muzzle device, this upper is ready to go on a quality lower receiver and get you behind glass and into the field or to the range with minimal fuss.

Key Features

• M89/L89 handguard integration with precision relief cuts for superior lockup and minimal flex
• Substantially reinforced upper receiver profile for enhanced barrel-to-optics stiffness
• Proven accuracy and zero retention under bipod and barricade loading
• Forward-shifted Forward Assist for improved left-hand charging clearance
• 6mm ARC chambering for efficient, flat-shooting performance
• 14.5" barrel paired with 13" M89 rail for balanced ergonomics and modularity
• Nox muzzle device included

Specifications

Frequently Asked Questions

What handguards are compatible with the Broadsword-89 upper receiver?

The Broadsword-89 is designed to integrate with M89 and L89 handguards. The relief cuts on the receiver face create a precision lockup specific to this system.

Is this a complete upper receiver or do I need additional parts?

This is a complete upper receiver assembly that includes the barrel, rail, and muzzle device (Nox). You will need a lower receiver to complete your rifle build.

What is 6mm ARC and why would I choose it?

6mm ARC is a modern rifle cartridge known for efficient ballistics and flat shooting characteristics. It's suitable for both precision shooting and tactical applications, offering good performance from intermediate-length barrels like this 14.5" configuration.

How does the Broadsword-89 design reduce point-of-impact shift?

The reinforced receiver profile stiffens the barrel-to-optics interface, and the enhanced M89 handguard lockup minimizes flex during aggressive shooting positions like bipod or barricade use. This reduces the movement that causes zero shift between shooting scenarios.