Stag 15 5.56 M4 Upper Receivers - Stag 15 M4 Phosphate Upper
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Stag Arms
Overview
The Stag 15 5.56 M4 Upper Receiver is a complete assembly designed for the AR-15 platform, featuring a 15-inch barrel optimized for 5.56 NATO caliber ammunition. This M4 receiver type provides a reliable and robust foundation for your build, ensuring compatibility with a wide range of AR-15 components and accessories. Commonly found in mid-length builds, this upper receiver is a solid choice for those looking to enhance their rifle's performance.
Specifications
Stag 15 5.56 M4 Upper Receivers - Stag 15 M4 Phosphate Upper
Build history on GunPartPicker
Builders on GunPartPicker first added the Stag 15 5.56 M4 Upper Receivers - Stag 15 M4 Phosphate Upper to a build in May 2026.
It was out of stock everywhere we track for all of September 2026, and today none of the 3 retailers we track has it in stock right now. Listed prices start at $448.13 at BattleHawk Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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