Harrington & Richardson XM607 Complete Lower
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Harrington & Richardson
Overview
The Harrington & Richardson XM607 Complete Lower is a fully assembled lower receiver designed for the AR-15 platform. This complete assembly simplifies the building process by eliminating the need for individual component installation, allowing builders to focus on upper assembly and customization. This lower is a solid choice for those looking to create a reliable and functional AR-15 without the hassle of piecing together various parts.
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August 2026 on GunPartPicker
Harrington & Richardson XM607 Complete Lower ranked #80 of the 507 lower receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since July 2026. All time, it ranks #118 of the 956 lower receivers builders have added. Builds with this lower receiver are nearly all AR-15.
Updated · from real builds on GunPartPicker
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