AR15.COM Armament Rifle Honeoye Fall , NY.
New Evolution Military Ordinance
If you have big bucks and want titanium this is your place
Iron Ridge Arms Longmont , CO.
Schmeisser - Germany
Christian Armory Works
Rock Springs GA.
High Mountain Hunting Supply
Taiwan state arsenal makes a M4 clone for the Taiwan military - if we are including military suppliers.
Chattahoochee Gun Works LLC.
Phenix City Alabama
Medesha Firearms - Mesa, AZ