Radical Firearms .450 Bushmaster AR-15 Barrel - 20"
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Radical Firearms
Overview
The Radical Firearms .450 Bushmaster AR-15 Barrel is a 20-inch heavy profile barrel designed specifically for the .450 Bushmaster cartridge. With a rifle-length gas system, it ensures reliable cycling and optimal performance, while the 1:16 twist rate stabilizes heavier projectiles effectively. This barrel is commonly found in builds that prioritize the .450 Bushmaster caliber, making it a solid choice for those looking to maximize power and accuracy in their AR-15 platform.
Specifications
Radical Firearms .450 Bushmaster AR-15 Barrel - 20"
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Build history on GunPartPicker
Builders on GunPartPicker first added the Radical Firearms .450 Bushmaster AR-15 Barrel - 20" to a build in February 2026. Builds with this barrel are nearly all chambered in .450 Bushmaster, 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 31 builds that include this one
Radical Firearms 5.56 Barreled AR-15 Upper - 16" - Primary Arms Exclusive
Yankee Hill Machine Complete AR-15 Lower Receiver - M4 Stock
Battle Arms Development Rack Ambidextrous AR-15 Charging Handle - Mod C
Daniel Defense MFR XL Free Float AR-15 Handguard - M-LOK - 9"
Diamondback Firearms 5.56 AR-15 Bolt Carrier Group - Nitride
Magpul RVG Rail Vertical Grip - Black
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.
Builds Featuring This Part
See all 4 →Builds in the community that include the Radical Firearms .450 Bushmaster Ar-15 Barrel - 20"
| Build | Parts | Total |
|---|---|---|
 | 27 | $4217.78 |
 | 25 | $2575.39 |
 | 21 | $1156.04 |
| 10 | $1552.22 |
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