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Radian
Overview
The Radian Weapons Model 1 Builder Kit is a complete lower receiver assembly designed specifically for the AR-15 platform, allowing builders to easily start their custom builds with a high-quality foundation. This kit comes in a sleek black finish, providing a modern aesthetic while ensuring compatibility with a variety of upper receivers and components. It is commonly utilized in a range of builds, from tactical setups to precision rifles, making it a versatile choice for AR enthusiasts.
Specifications
Available Merchants(6)
Prices checked
Price Alert
September 2026 on GunPartPicker
Radian Weapons Model 1 Builder KIT 14" Radian Black ranked #166 of the 477 lower receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #339 of the 1,050 lower receivers builders have added.
It was in stock most days in September 2026, but today 2 of the 6 retailers we track have it in stock. Prices barely moved in September 2026, holding around $1,359.95, so there haven't been real sales lately. Buying today, the lowest price is $1,359.95 at Brownells, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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We ranked every lower receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Lower Receiver Trends →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
Geissele Automatics AR-15 Super Dynamic Combat Trigger
Sr-25 Precision Rifle Complete Upper Receiver 6.5 Creedmoor M-LOK - Upper Receiver Precision Rifle KIT 6.5 Creedmoor 22 Barrel
Hogue Grip w/ Finger Grooves for AR-15/M-16 Rifles, Purple - 15006
Guntec USA AR-15 Extended Ergonomic Bolt Catch Matte Rainbow PVD Coated
Guntec USA AR-15 Mag Catch Lever Rainbow PVD
Radian Raptor Slim Line Ambidextrous AR-15 Charging Handle - Black
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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