Sons of Liberty Gun Works M4-L89 Upper Receiver Group, Upper Receiver, 5.56 NATO, 14.5″ P/w Asr

Product Description

The Sons of Liberty M4-L89 5.56 upper receiver group delivers premium American-made quality for discerning AR-15 builders. This complete upper features a 14.5″ barrel chambered in 5.56 NATO with a pinned and welded ASR flash hider that achieves legal 16″ overall length compliance. The M4-L89 combines tight tolerances with proven reliability for tactical shooters and competition participants.

Key Features and Specifications

Furthermore, this upper receiver group includes a 13.75″ L89 free-floating rail system. The rail provides ample real estate for mounting optics, lights, and accessories without compromise. Additionally, the matte black finish resists corrosion and glare in demanding field conditions. The upper receiver is machined to tight tolerances for reliable performance.

The M4-L89 fits standard AR-15 lower receivers seamlessly using the standard takedown and pivot pin interface. The 5.56 NATO chambering offers compatibility with both military and commercial ammunition. Moreover, the integrated pinned and welded design simplifies assembly and reduces point-of-failure areas compared to removable muzzle devices.

Perfect for AR-15 Builders and Multi-Platform Versatility

This upper suits tactical shooters, competition participants, and civilian marksmen alike. The compact 14.5″ barrel balances maneuverability with effective range and velocity. Additionally, the modular design allows customization to your exact specifications and preferences for training, caliber conversion, or role-specific builds.

However, note that this upper does not include a bolt carrier group or charging handle. Therefore, you’ll need to source these components separately for a complete rifle. Consider this a blank canvas for your next precision build project.

Available at Western Sport – Roanoke, TX

Western Sport is a licensed FFL/SOT dealer serving the North Texas and DFW area since 2007. Our Roanoke location carries premium manufacturers like Sons of Liberty Gun Works with competitive pricing and fast transfers. Call us at 817-393-4000 to check inventory or discuss your next AR-15 project.

Why Buy from Western Sport?

• Licensed FFL/SOT dealer with real-world shooting experience and AR-15 platform expertise.
• Local North Texas service means fast transfers and personalized support for your build.
• Our knowledgeable staff confidently answers technical questions about upper compatibility and assembly.
• Competitive pricing on premium manufacturers like Sons of Liberty Gun Works.
• Dedicated after-sale support and guidance to ensure your rifle performs reliably.

Frequently Asked Questions

Q: Will the Sons of Liberty M4-L89 upper fit my AR-15 lower receiver?

A: Yes, the M4-L89 upper receiver group fits standard AR-15 lower receivers using the universal takedown and pivot pin interface. No modifications are required for compatibility.

Q: What components do I still need to complete this rifle build?

A: You’ll need a bolt carrier group, charging handle, and lower receiver to complete your rifle. Additionally, consider furniture like grips, stocks, and magazines for a finished build.

Q: Can Western Sport handle my FFL transfer in Roanoke, TX?

A: Absolutely. Western Sport is a licensed FFL/SOT dealer in Roanoke with fast transfers and knowledgeable staff. Call 817-393-4000 to initiate your transfer and discuss timing.

Q: Is the pinned and welded ASR flash hider permanent?

A: Yes, the ASR flash hider is pinned and welded permanently to achieve 16″ overall length compliance. This design eliminates the need for a separate muzzle device and reduces failure points.

Additional information