Up to 20% Off AR-15 Uppers & Accessories | Shop Now

Up to 20% Off AR-15 Uppers & Accessories | Shop Now

Radical Firearms AR-15 Build Kits

Radical Firearms produces high-value build and conversion kits in a variety of calibers for the AR-15, whether you’re looking to get into precision or high-volume plinking!

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Radical Firearms 16" 5.56 NATO Complete Upper Receiver with M-LOK Handguard - AT3 Tactical

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Radical Firearms 16″ 5.56 NATO Complete Assembled AR-15 Upper Receiver with M-LOK Handguard

Radical Firearms 16" .300 Blackout Complete Upper Receiver with M-LOK Handguard - AT3 Tactical

Radical Firearms 16″ .300 Blackout Complete Assembled AR-15 Upper Receiver with M-LOK Handguard

Radical Firearms 16" 7.62x39 Complete Upper Receiver with M-LOK Handguard - AT3 Tactical

Radical Firearms 16″ 7.62×39 Complete Assembled Upper Receiver with M-LOK Handguard

Radical Firearms 16" 6.5 Grendel Complete Upper Receiver with M-LOK Handguard - AT3 Tactical

Radical Firearms 16″ 6.5 Grendel AR-15 Complete Assembled Upper Receiver with M-LOK Handguard