5.56 NATO

Daniel Defense

Daniel Defense DDM4 V7 LW URG 5.56 NATO Accessory Upper Receiver with 16-Inch Barrel

Patriot Ordnance Factory (POF)

POF USA Renegade+ Upper 5.56 NATO, 16.5-Inch Black Anodized with M-Lok Handguard

Patriot Ordnance Factory (POF)

POF USA P-415 EDGE Upper Receiver 5.56 NATO with 14.5-inch M-Lok Rail and Short-Stroke Piston

Patriot Ordnance Factory (POF)

POF USA P-415 EDGE Upper Receiver for 5.56 NATO with 10.5-Inch Barrel - Black Anodized Finish

Patriot Ordnance Factory (POF)

POF USA Renegade+ Upper Receiver for 5.56 NATO - Black Anodized Finish

Daniel Defense

Daniel Defense DDM4 V7 S URG 5.56mm 11.5-inch Upper Receiver with M-LOK Rail

Daniel Defense

Daniel Defense DDM4 V7 URG 5.56 NATO Upper Receiver with 16-Inch Barrel