Harrington & Richardson Retro M16A1 20" AR-15 Upper 5.56 1:12 Rifle Length, Black
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Harrington & Richardson
Overview
The Harrington & Richardson Retro M16A1 Upper is a complete assembly designed for the AR-15 platform, featuring a 20-inch barrel optimized for 5.56 NATO ammunition. With a rifle-length gas system and a twist rate of 1:12, this upper receiver delivers reliable cycling and performance tailored for standard velocity loads, making it ideal for precision shooting and vintage-style builds. Commonly found in retro military-inspired configurations, this upper adds authenticity and functionality to your AR-15 project.
Specifications
Harrington & Richardson Retro M16A1 20" AR-15 Upper 5.56 1:12 Rifle Length, Black
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Build history on GunPartPicker
Builders on GunPartPicker first added the Harrington & Richardson Retro M16A1 20" AR-15 Upper 5.56 1:12 Rifle Length, Black to a build in February 2026.
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