Guns Modify Aluminum AR M4 Upper Receiver for MWS GBBR

DOES NOT INCLUDE FORWARD ASSIST OR DUST COVER

• Aluminum upper receiver construction provides lightweight durability
• Designed for AR M4 MWS base platform compatibility
• Precision fitment for Tokyo Marui GM and HA MWS GBB systems
• Supports steel CNC barrel extension setups
• Blank black finish allows for custom builds or refinishing
• Maintains standard M4 receiver profile for realistic appearance
• Engineered for reliable alignment and structural integrity