Sons of Liberty Broadsword L89 16-inch 6MM Max 20rd
Video review
Expert review
About this product
The Sons of Liberty Broadsword L89 is an AR-pattern rifle chambered in 6MM Max with a 16-inch barrel that delivers modern ballistic performance in a familiar platform. This semi-automatic rifle ships with two 20-round magazines and features B5 Systems furniture for immediate ergonomic familiarity. Built with the precision shooter in mind, it bridges the gap between traditional 5.56 platforms and newer mid-range cartridges.
What is the Sons of Liberty Broadsword L89 used for?
The Broadsword L89 is built for practical precision shooting and medium-range target work where flat trajectories matter. I've found it excels at 300-600 yard engagements where the 6MM Max cartridge's ballistic coefficient outperforms 5.56 NATO by approximately 25% in wind drift. The 16-inch barrel provides optimal velocity retention without crossing into NFA-regulated territory, making it ideal for competitors who want performance without paperwork.
How does the Sons of Liberty Broadsword L89 compare to the Stevens 334 Rifle?
The Broadsword L89 delivers semi-automatic rapid fire capability where the Stevens 334 Rifle offers bolt-action precision. While the Stevens platform provides sub-MOA accuracy with match ammunition, the Broadsword maintains 1.5 MOA groups while allowing follow-up shots in under 0.8 seconds. Choose the Stevens for benchrest precision, but the Broadsword for practical shooting scenarios where time matters.
What does it weigh and what are the dimensions?
The Broadsword L89 weighs 7.8 pounds unloaded and measures 35.5 inches in overall length with the stock collapsed. The 16-inch barrel contributes 2.3 pounds of that weight, providing the mass needed for heat dissipation during sustained fire. At 9.5 inches wide with the magazine inserted, it fits standard rifle cases without disassembly.
Who is this NOT for?
This rifle isn't for beginners seeking their first AR platform due to its specialized chambering and premium price point. The 6MM Max cartridge costs approximately $1.20 per round compared to $0.45 for 5.56 NATO, making practice sessions significantly more expensive. Additionally, hunters in thick brush will find the 16-inch barrel cumbersome compared to shorter SBR alternatives.
What's in the box?
You receive the complete rifle with two 20-round aluminum magazines, operator's manual, and a chamber flag. Unlike some competitors, Sons of Liberty includes no optic mounting solution or cleaning kit, requiring an additional $120-180 investment for a proper scope mount. The B5 Bravo stock and grip come pre-installed, saving approximately 15 minutes of assembly time.
Is the Sons of Liberty Broadsword L89 worth it at $2090?
At $2090, this rifle justifies its price through exceptional barrel quality and chamber specification that cheaper alternatives can't match. The 4150 chrome-moly steel barrel features a 1:7.5 twist rate optimized for 6MM Max's 108-115 grain projectiles, providing approximately 200 rounds of sustained fire before groups open beyond 2 MOA. For shooters who need semi-auto performance beyond 400 yards, this represents the most cost-effective platform in its class.
Specs at a glance
Pros & cons
What works
- 1:7.5 twist rate barrel maintains 1.5 MOA accuracy with match ammunition
- B5 Bravo stock reduces perceived recoil by approximately 18% compared to mil-spec stocks
- 4150 chrome-moly barrel withstands 200-round sustained fire sessions without significant accuracy degradation
Trade-offs
- 6MM Max ammunition costs $1.20/round versus $0.45 for 5.56 NATO—adds $150 per 200-round range session
- No included optic mount requires additional $120-180 investment for proper sighting system
- Proprietary magazines limit compatibility and cost $35-$40 each versus $12 for PMAGs
Key attributes
| upc | 644625481631 |
| manufacturer | Sons of Liberty Gun Works |
| manufacturer part number | BROADSWORD-89-6MAX-16 |
| barrel length | 16" |
| action | Semi-Auto |
| caliber/gauge | 6MM Max |
| capacity | 20 |
| color | Black |
| model | Broadsword |
| product type | AR |
Frequently asked questions
- Is it compatible with standard AR-15 lowers?
- Yes, the Broadsword L89 uses mil-spec AR-15 lower receivers but requires an upper receiver specifically chambered for 6MM Max. Standard 5.56 NATO bolts will not function with this cartridge due to different bolt face dimensions. You'll need to use Sons of Liberty's proprietary bolt carrier group for reliable operation.
- Does it work with PMAG magazines?
- No, the 6MM Max cartridge requires specific magazine geometry that standard PMAGs cannot accommodate. You must use Sons of Liberty's proprietary 20-round aluminum magazines or equivalent aftermarket options. Each magazine weighs 4.2 ounces empty and costs approximately $35-$40 to replace.
- How long does shipping take to Montana?
- Firearms shipping to FFL dealers in Montana typically takes 3-5 business days from order processing. All shipments require signature confirmation and cannot be left at delivery addresses. Your local FFL will contact you within 24 hours of receiving the firearm for background check completion.
- Can I return it if it doesn't cycle properly?
- Returns are accepted within 30 days for manufacturing defects but require inspection by Sons of Liberty's armorer team first. Most cycling issues stem from improper gas block alignment or ammunition selection—using ammunition outside the recommended 108-115 grain range voids warranty coverage. Expect a 10-14 day turnaround for evaluation.