Sons Of Liberty Gun Works Broadsword-89 6Mm Max 20'' Bbl 16.75'' M89 Rail W/Nox

The Sons of Liberty Gun Works Broadsword-89 upper receiver is purpose-built for precision rifle shooters who demand rock-solid repeatability under aggressive field conditions. This 6mm Max upper comes with a 20-inch barrel and a 16.75-inch M89 rail system paired with a Nox muzzle device. The M89 handguard interface is where the Broadsword-89 really sets itself apart—relief cuts on the receiver face create an exceptionally stout lockup that all but eliminates the POI shift that comes with hard bipod and barricade loading. If you're running precision loads and need every shot to land where your reticle says it will, the engineering here matters.

SOLGW started with what shooters loved about the original Broadsword platform and made it stiffer. The upper receiver is reinforced throughout its profile to minimize deflection at the barrel-to-optic interface—the kind of thing that separates a good shooter's gun from a truly consistent one. The forward-assist placement has been shifted to give your support-side hand more room when working the charging handle, a detail that pays dividends in awkward positions or when you're running left-handed. Pair this with a quality bolt carrier group and lower, and you've got the foundation for a serious long-range or precision competition build.

The 6mm Max cartridge is gaining traction in the precision rifle world for its balance of velocity and magazine compatibility. With a Precision Rifle Barrel already fitted and the Nox brake handling recoil management, you're looking at a complete upper that's ready to mate to your lower and go to work.

Key Features

• M89/L89 handguard interface with relief cuts for enhanced lockup stiffness
• Significantly reinforced upper receiver profile to reduce barrel-to-optics deflection
• Forward-assist positioned for improved left-hand charging handle clearance
• Chambered in 6mm Max for long-range precision applications
• 20-inch barrel with 16.75-inch M89 rail system
• Includes Nox muzzle device
• Minimizes point-of-impact shift under bipod and barricade loading

Specifications

Frequently Asked Questions

What handguard systems are compatible with the Broadsword-89 upper?

The Broadsword-89 upper is designed to work with M89 and L89 handguard systems. The receiver has relief cuts that provide a stout lockup interface specific to these rail platforms.

What is the M89 rail system and what length is included on this upper?

The M89 is a handguard rail platform. This upper includes a 16.75-inch M89 rail section.

Is this a complete upper receiver ready to shoot?

This is an upper receiver assembly with barrel, rail, and muzzle device. You will need to pair it with a lower receiver group (lower receiver, fire control group, stock, and grip) to complete a functioning rifle.

Why does the forward-assist positioning matter?

The forward-assist has been moved forward on the Broadsword-89 to provide additional clearance for left-handed shooters manipulating the charging handle, making the rifle more ergonomic from the left side.