FN FN15 Complete Lower 5.56 / .223 Rem
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FN America
Overview
The FN FN15 Complete Lower is a fully assembled lower receiver designed for the AR-15 platform, specifically chambered in 5.56 NATO. This component includes all necessary parts for operation, allowing builders to easily pair it with an upper receiver of their choice, making it ideal for both novice and experienced gun enthusiasts. You'll typically find this lower in builds focused on the 5.56 NATO caliber, emphasizing versatility and performance in a variety of shooting applications.
Specifications
August 2026 on GunPartPicker
FN America FN FN15 Complete Lower 5.56 / .223 Rem ranked #278 of the 507 lower receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #336 of the 961 lower receivers builders have added. Builds with this lower receiver are nearly all AR-15.
It was out of stock everywhere we track for all of August 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $403.99 at KY Gun Company for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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Frequently Built With
The part most often added in each category by the 11 builds that include this one
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EOTECH 3x30.5mm X 21.6mm Holographic Hybrid Green Dot Sight - HHSGRN
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Aero Precision M4E1 Threaded 350 Legend Assembled Upper Receiver - M4E1 Threaded Assembled Upper 350 Legend 16" QPQ Carbine FDE
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Fortis SHIFT Vertical Grip - M-LOK
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