American Defense Uic Billet AR-15 Lower Receiver - Ambidextrous
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American Defense
Overview
The American Defense UIC Billet AR-15 Lower Receiver is a stripped lower designed for builders who value both functionality and precision. With its ambidextrous controls, this receiver accommodates both left- and right-handed shooters, enhancing usability in various shooting scenarios. Crafted from billet aluminum and finished with hardcoat anodizing, it provides a robust platform for your AR-15 while ensuring compatibility with standard trigger pins measuring .154. This lower is commonly found in builds featuring a carbine gas system and chambered in 5.56 NATO, making it a solid choice for a wide range of applications.
Specifications
August 2026 on GunPartPicker
American Defense Uic Billet AR-15 Lower Receiver - Ambidextrous ranked #96 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 #129 of the 1,002 lower receivers builders have added. Builds with this lower receiver are mostly chambered in 5.56 NATO (82%, then 300 Blackout 18%), split between carbine-length (44%) and mid-length (33%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today the one retailer we track has it in stock. Prices barely moved in August 2026, holding around $399, so there haven't been real sales lately. Buying today, the lowest price is $399 at Primary Arms, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 38 builds that include this one
Geissele Automatics AR-15 14.5" Super Duty Stripped Upper Receiver Black
Geissele Automatics AR-15 SSA X Lightning Bow Trigger
Geissele Automatics Airborne Charging Handle Black
B5 Systems Type 22 P-Grip - Black
Bravo Company M16 Bolt Carrier Group Black
Radian Weapons Talon Ambidextrous Safety Selector 2-Lever KIT - Radian Grey
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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