Sons of Liberty Gun Works M4 L89 CHF 5.56 NATO Barreled Upper Receiver - 13.9" - No Muzzle Device

Start your next AR-15 build with the Sons of Liberty Gun Works M4-L89 CHF 5.56 NATO Barreled Upper Receiver. Designed for performance, this upper includes a 13.9-inch barrel with a mid-length gas system, constructed from high-quality 4150 CMV steel. The barrel has a 1:7 twist rate and 1/2x28 threading, making it compatible with a wide range of muzzle devices.

Features:

• Chambered in 5.56 NATO
• 13.9” 4150 CMV cold hammer forged barrel, QPQ finish
• Mid-length gas system
• 1:7 twist rate
• 1/2x28 threads
• 13” L89 Free Float M-LOK Handguard
• Drive Lock system
• Black

The M4-L89 upper is equipped with a free-float L89 M-LOK handguard featuring the "Drive Lock" system, providing a secure platform for mounting accessories. The integrated Picatinny top rail offers additional space for other attachments, giving you the flexibility to tailor your AR-15 to your specific needs.