Product Details
Sons of Liberty Gun Works, M4-L89 Upper Receiver Group, Upper Receiver, 5.56 NATO, 14.5" Barrel with Pinned and Welded HUXWRX Muzzle Device (16" OAL), Fits AR-15, Matte Finish, Black, Includes 13.75" L89 Rail, Does Not Include BCG or Charging Handle
- 14.5" 5.56 NATO Barrel
- 13.75" L89 Handguard
- HUXWRX Flash Hider
- 7-Sided M-LOK Slots
- Integral QD's at Barrel Nut on Both Sides
- Drivelock Barrel Nut System
Sons of Liberty Gun Works is a manufacturer of quality firearms and parts, perfect for your next build, next competition, or next line of defense. Their small parts fit most mil-spec firearms. These uppers are built with L89 7-sided rails, forged uppers, and Liberty Fighting Barrels. There are multiple options of lengths and muzzle devices.
