Harrington & Richardson XM607 Complete Lower
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Harrington & Richardson
Overview
The Harrington & Richardson XM607 Complete Lower is a forged lower receiver designed for AR-15 builds, crafted from durable 7075-T6 aluminum to ensure strength and longevity. It comes fully assembled and is tailored for the 5.56 NATO caliber, making it a reliable choice for those looking to build a versatile and effective firearm. This lower is commonly found in builds focused on the 5.56 NATO caliber, aligning with popular configurations among enthusiasts.
Specifications
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Build history on GunPartPicker
Builders on GunPartPicker first added the Harrington & Richardson XM607 Complete Lower to a build in February 2026.
Updated · from real builds on GunPartPicker
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