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 AR 15 Upper Receiver with M-LOK Handguard
Complete Budget-Friendly Upper Receiver for 5.56 NATO AR Builds The Radical Firearms 16" 5.56 NATO Complete Upper Receiver is a great way to start your .223/5.56 NATO AR build. It... -
Radical Firearms 16″ .300 Blackout Complete AR 15 Upper Receiver with M-LOK Handguard
Complete Budget-Friendly Upper Receiver for .300 Blackout AR Builds The Radical Firearms 16" .300 Blackout Complete Upper Receiver is a great way to start your .300 Blackout AR build. It... -
Radical Firearms 16″ 7.62×39 Complete Upper Receiver with M-LOK Handguard
Complete Budget-Friendly Upper Receiver for 7.62mm AR Builds The Radical Firearms 16" 7.62x39 Complete Upper Receiver is a great way to start your 7.62mm AR build. It is an outstanding... -
Radical Firearms 16″ 6.5 Grendel AR 15 Complete Upper Receiver with M-LOK Handguard
Complete Budget-Friendly Upper Receiver for 6.5 Grendel AR Builds The Radical Firearms 16" 6.5 Grendel Complete Upper Receiver is a great way to start your 6.5 Grendel AR build. It...
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