Description
The 6mm MAX is one of the more interesting things to happen to the small-frame AR in a long time. Built off the 350 Legend parent case, it keeps the standard .378 bolt face and full-mass bolt carrier while packing enough case capacity to drive 6mm bullets from 55 up to 100 grains at real velocities. That means better wind performance and more energy downrange than 5.56 without beating up your bolt the way some other 6mm options do, and it stays supersonic well past distances most people ever get to stretch a carbine. Sons of Liberty Gun Works built the Broadsword M89 specifically to get the most out of it.
What Makes the Broadsword M89 Different
The heart of this rifle is the Broadsword-89 billet receiver set. The upper features an extended barrel nut and keyed face that locks into the 13" M89 Drive Lock M-LOK handguard with tensioning crossbolts and anti-rotation tabs. The point of all that hardware is rigidity. Load up on a bipod or lean hard into a barricade and your point of impact stays put, which matters a lot more than people realize once targets get small and far away. The 14.5" 416 stainless steel match-profile barrel wears a pinned and welded NOX muzzle device to bring it to 16" overall, so you get a shorter, handier package without the extra paperwork.
Controls and Furniture Done Right
SOLGW didn't cut corners on the parts you touch. The Liberty two-stage trigger breaks clean at around 4.5 pounds with a short, snappy reset, and the charging handle, safety, and bolt release are all fully ambidextrous. The A5 buffer system smooths out the recoil impulse, and B5 Systems Bravo stock and grip round out the furniture. Two integrated QD sockets in the rail make sling setup simple.
Broadsword M89 6mm MAX at the Range
This is a rifle for the shooter who wants one gun that can run carbine drills up close and still ring steel way out there. It ships with two 20-round magazines and a soft case, and SOLGW stands behind it with a lifetime warranty. Add glass and ammo and go shoot.
Key Specifications
- Manufacturer: Sons of Liberty Gun Works
- Model: Broadsword M89
- MPN: BROADSWORD-89-6MAX-14.5
- UPC: 644625400342
- Caliber: 6mm MAX
- Action: Semi-Auto
- Barrel Length: 14.5" Pinned & Welded (16" OAL)
- Barrel Material: 416 Stainless Steel, Match Profile
- Muzzle Device: NOX, Pinned and Welded
- Gas System: Mid-Length
- Handguard: 13" M89 Drive Lock Free Float M-LOK
- Trigger: Liberty Two-Stage, approx. 4.5 lb
- Stock: B5 Systems Bravo
- Grip: B5 Systems
- Capacity: 20 Rounds
- Finish: Black Hardcoat Anodized
What’s Included
- Broadsword M89 6mm MAX rifle
- Two 20-round magazines
- Soft rifle case
- Bottle of gun lubricant
Frequently Asked Questions
What is 6mm MAX and how does it compare to 6mm ARC?
6mm MAX is a newer cartridge built on the 350 Legend parent case that keeps the standard .378 AR-15 bolt face and full-mass bolt carrier. It holds about 35 grains of water capacity, which lets it push 6mm bullets from 55 to 100 grains at strong velocities while staying supersonic past 1000 yards. The big draw over other small-frame 6mm rounds is that it delivers that performance without the accelerated bolt and extractor wear that comes with the larger case head designs.
Do I need special magazines for the Broadsword M89 in 6mm MAX?
Yes, 6mm MAX feeds from magazines based on the 350 Legend cartridge rather than standard 5.56 mags. The rifle ships with two 20-round magazines so you're covered right away, and companies like Duramag produce additional 6mm MAX compatible mags if you want spares.
Why is the barrel on the Broadsword M89 pinned and welded?
The NOX muzzle device is permanently pinned and welded to the 14.5 inch barrel, bringing the total barrel length to 16 inches overall. This gives you the shorter, quicker-handling feel of a 14.5 inch setup in a standard rifle configuration. The NOX also serves as a mount for Dead Air Keymount suppressors if you shoot suppressed.
Is the Broadsword M89 accurate enough for longer range shooting?
It's built for exactly that. The 416 stainless match barrel, rigid Broadsword-89 receiver and Drive Lock handguard interface, and Liberty two-stage trigger are all aimed at consistent precision, and the 6mm MAX cartridge has shown MOA or better results with quality ammo. The stiff rail lockup also means bipod and barricade pressure has minimal effect on point of impact.




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