.300 Blackout Radical Firearms Uppers for AR-15
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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...
Readily convert your AR-15 lower to .300 Blackout with a complete upper from Radical Firearms – use your existing mags and hit the range with .30 cal stopping power.
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