Sons of Liberty M4-L89 Upper Receiver 14.5" 5.56
Complete upper receiver group featuring a 14.5" barrel with pinned and welded Plan B flash hider, 13.75" L89 rail, and forged construction. Matte black finish. Fits standard AR-15 platforms.
Sons of Liberty M4-L89 Upper Receiver Group
This is a purpose-built upper receiver assembly from Sons of Liberty Gun Works, engineered for shooters who demand quality and reliability in their AR platform rifle.
Key Features
- Forged Upper Receiver: Mil-spec construction ensures durability and compatibility with standard AR-15 components
- 14.5" Barrel: Pinned and welded Plan B flash hider brings overall length to 16" for legal compliance in restricted jurisdictions
- L89 7-Sided Rail System: 13.75" of mounting space for optics, lights, and accessories with a distinctive seven-sided design
- Liberty Fighting Barrel: Precision-manufactured barrel optimized for 5.56 NATO ammunition
- Matte Black Finish: Durable coating resists corrosion and glare
What's Included
This upper receiver group arrives ready for integration into your build. Note that it does not include a bolt carrier group or charging handle—you'll need to source those separately to complete your rifle.
Ideal For
Whether you're building a competition rifle, a home defense platform, or simply upgrading your existing AR-15, this upper receiver delivers the quality and versatility that serious shooters expect.
Features
- 14.5 5.56 nato barrel"
- 13.75 l89 handguard"
- plan b flash hider
- 7-sided m-lok slots
- integral qd's at barrel nut on both sides
- drivelock barrel nut system
