Sons of Liberty Gun Works M4-89 URG Upper Receiver 9″ – 300BLK

Original price was: $900.00.Current price is: $859.00.

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SKU: M489UPPER-9-300 UPC: 785939519112

Product Description

There is no substitute for quality. Sons of Liberty Gun Works believes in Quality Mil-Spec or better parts. Every gun should be built right the first time, ready for hard use right out of the box. They believe a quality, accurate, and long lasting barrel is the heart of a Combat Grade weapon. SOLGW believes in properly tuned weapons using the correct gas system length and quality buffer system components. All of these beliefs are forged together to bring you the SOLGW M4-89 Complete Upper with 9″ 300BLK Barrel and an A2 Flash Hider. Featuring the M89 Handguard. They believe in their products and back them up with a Lifetime Warranty. Does not include a BCG or Charging Handle.


  • Barrel: 9″ Combat Barrel
  • Caliber: 300 Blackout
  • Twist Rate: 1:7
  • Handguard: 8″ M89 MLOK
  • Thread Pitch: 5/8×24
  • Finish: QPQ


  • Does NOT include a BCG or Charging Handle


Technical Information


.300 AAC Blackout

Barrel Twist


Thread Pitch

5/8 x 24


QPQ Corrosion Resistant

Firearm Compatibility

Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit