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.
Specifications
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September 2026 on GunPartPicker
Harrington & Richardson XM607 Complete Lower ranked #104 of the 477 lower receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since July 2026. All time, it ranks #140 of the 1,125 lower receivers builders have added. Builds with this lower receiver are nearly all chambered in 5.56 NATO, nearly all on rifle-length gas, and nearly all AR-15.
Updated · from real builds on GunPartPicker
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Frequently Built With
The part most often added in each category by the builds that include this one
BKF M16A1 10.5″ 5.56 Colt Model 607 Style Complete Upper – (Pistol or SBR)
Rise Armament Super Sporting AR15/10 Single Stage Trigger - Flat - Dtom Special Edition
H&R Retro Charging Handle, Gray Anodized
Wilson Combat M16 Bolt Carrier Assy 5.56 NATO Polished Black Nitride
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