The Sons Of Liberty Gun Works Solgw M4-L89 Urg 8.5" .300blk A2 Upper Receiver Group is built for shooters who want a compact, purpose-driven .300 Blackout upper that mirrors the standards of SOLGW’s complete rifles. Centered around an 8.5" .300 AAC Blackout barrel with 5/8x24 threads and an A2 flash hider, this upper pairs a forged receiver with the 7.75" L89 M-Lok rail for a rigid, lightweight front end and clean accessory mounting.

This upper receiver group is ideal for range use, training, and building a dedicated .300 Blackout AR-15 for suppressed or unsuppressed shooting. It arrives ready to pin onto your compatible lower, with the L89 rail providing multiple M-Lok slots and integral QD points for slings or accessories. The assembly does not include a bolt carrier group or charging handle, allowing you to choose components that match your preferred setup, while SOLGW’s reputation for careful assembly and test firing underscores the reliability and craftsmanship behind this upper.

• Manufacturer: Sons of Liberty Gun Works
• Model: M4-L89 Upper Receiver Group
• Caliber: .300 AAC Blackout
• Barrel Length: 8.50"
• Muzzle Device: A2 Flash Hider
• Handguard Length: 7.75" L89 Rail With M-Lok Slots
• Excludes: Bolt Carrier Group And Charging Handle