Sons of Liberty Gun Works M4 L89BS 13.7-inch Pinned Barrel 5.56 NATO Black Rifle
Caliber: 5.56 NATO, .223 Remington · Capacity: 30
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Specifications
Action Semi-Automatic
Finish Black
Capacity 30
Grip Safety No
Optic Ready Yes
Barrel Length 13.7 inches
Manual Safety Yes
Trigger Safety No
Caliber / Gauge 5.56 NATO, .223 Remington
Threaded Barrel Yes
Magazines Included 1
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
Description
Product Overview
The Sons of Liberty Gun Works M4 L89BS is a semi-automatic AR-pattern rifle built around a 13.7-inch barrel with a permanently attached NOX flash hider, providing a 16-inch overall barrel length. Its midlength gas system supports smooth cycling, while the Liberty Fighting Trigger provides a refined trigger pull for practical accuracy. The rifle includes a B5 grip, black finish, 30-round capacity, and one magazine. Its flat-top receiver accepts a wide range of aftermarket optics and mounting systems.
Key Features
- 13.7-inch barrel with pinned NOX flash hider for a 16-inch overall barrel length
- 5.56 NATO chambering also compatible with .223 Remington ammunition
- Midlength gas system for balanced handling and reliable cycling
- Liberty Fighting Trigger for a clean, consistent trigger pull
- B5 grip improves control during sustained shooting
- Flat-top receiver supports flexible optic installation options
The M4 L89BS combines a compact pinned-barrel configuration with proven AR-pattern controls and practical upgrade compatibility.
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- SKU:
- LRF-L89BS-13.7
- UPC:
- 669185246629
- BUDS ID:
- 714034693
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Retail Availability
Bud's Gun Shop - Lexington, KY
1105 Industry Road, Lexington, KY 40505
Bud's Gun Shop - Sevierville, TN
2270 Two Rivers Blvd, Sevierville, TN 37876
Uncle Lee's - Greenville, KY
820 Main St, Greenville, KY 42345
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| Action | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic |
| Barrel Length (in.) | 13.7 | 13.7 | 16.0 | 14.0 | 16.0 |
| Caliber / Gauge | 5.56 NATO, .223 Remington | 5.56 NATO | 5.56 NATO | .223 Remington, 5.56 NATO | .223 Remington, 5.56 NATO |
| Capacity | 30 | 30 | 30 | 30 | 30 |
| Finish | Black | Black | Phosphate | Anodized Black | Black |
| Manual Safety | Yes | Yes | Yes | Yes | Yes |
| Threaded Barrel | Yes | Yes | Yes | Yes | Yes |
| Optic Ready | Yes | Yes | N/A | Yes | Yes |
| Overall Length (in.) | N/A | 32.5 | 32.0 | 32.5 | 32.0 |
| Weight (lbs) | N/A | 7.1 | 6.8 | 6.0 | 6.5 |
| Ambidextrous Safety | N/A | Yes | No | Yes | No |
| Sights | N/A | N/A | Standard Sights | Standard Sights | N/A |
| Actions | Current Item |
