Radical Firearms 12.7x42mm Nitrided 4150 AR-15 Barrel - 16"
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Radical Firearms
Overview
The Radical Firearms 12.7x42mm barrel is designed for .50 Beowulf builds, featuring a 16-inch heavy profile that enhances stability and accuracy while managing recoil. With a carbine-length gas system, this barrel provides reliable cycling and performance for your AR-15 platform. The 1:20 twist rate is optimized for stabilizing heavier projectiles, making this barrel suitable for those looking to build a robust firearm capable of handling the unique demands of .50 Beowulf ammunition.
Specifications
Radical Firearms 12.7x42mm Nitrided 4150 AR-15 Barrel - 16"
Available Merchants
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Build history on GunPartPicker
Builders have been adding the Radical Firearms 12.7x42mm Nitrided 4150 AR-15 Barrel - 16" to their builds on GunPartPicker since February 2026. All time, it ranks #146 of the 840 barrels builders have added.
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
Alexander Arms Tactical 16" Upper .50 Beowulf 1:20, Black - UTA50
Ballistic Advantage Stripped AR-15 Enhanced Lower Receiver
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Strike Industries AR Forward Assist With Hex Design Black
Bravo Company M16 Bolt Carrier Group Black
Superlative Arms AR-15 Adjustable Gas Block .750" Solid Melonite
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
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