AR-15 M4-76 Complete Upper Receiver Assembly - AR-15 M4-76 Upper Receiver 5.56 16'''' M-LOK Black
All Sons of Liberty Gun Works upper receivers
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Sons of Liberty Gun Works
Overview
The AR-15 M4-76 Complete Upper Receiver Assembly from Sons of Liberty Gun Works is designed to deliver reliable performance with its 16-inch barrel chambered in 5.56 NATO. This complete assembly makes it easy for builders to upgrade their existing lower receivers or create a new custom build. Its M-Lok system provides versatile mounting options for accessories, making it a strong choice for tactical or sport shooting applications.
Specifications
AR-15 M4-76 Complete Upper Receiver Assembly - AR-15 M4-76 Upper Receiver 5.56 16'''' M-LOK Black
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Stock Alert
Price and stock
The Sons of Liberty Gun Works AR-15 M4-76 Complete Upper Receiver Assembly - AR-15 M4-76 Upper Receiver 5.56 16'''' M-LOK Black was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $588.42 at Brownells for when it comes back.
Prices checked · refreshed daily across 37 retailers
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