Sons of Liberty Gun Works M4-L89 Upper Receiver 14.5"
Complete upper receiver group featuring a 14.5" barrel with pinned and welded ASR flash hider (16" OAL), 13.75" L89 rail, and matte black finish. AR-15 compatible. BCG and charging handle not included.
Fits: AR-15
Sons of Liberty Gun Works M4-L89 Upper Receiver Group
This is a purpose-built upper receiver designed for shooters who demand quality and reliability. The M4-L89 combines proven engineering with practical features for competition, duty, or defensive use.
Key Features
- Barrel: 14.5" 5.56 NATO with pinned and welded ASR flash hider
- Overall Length: 16" (compliant configuration)
- Rail System: 13.75" L89 seven-sided Picatinny rail for maximum mounting flexibility
- Upper Receiver: Forged construction for strength and durability
- Finish: Matte black
- Compatibility: AR-15 platform
What's Included
The upper receiver group arrives complete and ready for integration into your build. You'll need to source a bolt carrier group and charging handle separately to complete your rifle.
Design Philosophy
The L89 rail system provides ample real estate for optics, lights, and other accessories without unnecessary bulk. The pinned and welded flash hider creates a compliant 16" overall length while maintaining the handling characteristics of a shorter barrel. This is a no-compromise upper for serious shooters.
Features
- 14.5 5.56 nato barrel"
- 13.75 l89 handguard"
- asr flash hider
- 7-sided m-lok slots
- integral qd's at barrel nut on both sides
- drivelock barrel nut system
