About Us


Introducing OLYMPUS Arms LLC, a young progressive company formed by those with the same passion for quality, efficiency, accuracy, service and style when it comes to their custom A/R build. As a custom builder of fine A/R format defense, tactical, sport and hunting rifle and pistol upper receiver groups we strive to bring the best product to the market for those who demand only the best from their firearms. OLYMPUS Arms offers .223/5.56, 7.62 X 39, .308, 6.5, 6.8 and 300 Blackout calibers in upper receiver groups that attach to any standard Mil-spec AR or M4 lower. Offered in rifle and pistol configurations these fine quality uppers are custom built from high end quality parts made right here is the USA. Our products are then fire tested by a certified master gunsmith for quality assurance and ready to shoot.


In today’s world bringing the best options, configurations and styles in your A/R upper receiver is important to us. That’s why we offer several models including picatinny, key-mod and slim rail systems along with options in barrel length such as 16″, 18″ and 20 ” in rifle and 7″, 10″ and 11″ in pistol with several twist ratio’s for accuracy. In addition we have configurations that offer stainless barrels and muzzle brakes giving your upper a true custom look.


All our upper receivers have a limited lifetime warranty on parts and components, this is our pledge to you that we stand behind our products and will strive to bring you the best customer service and ownership experience. (contact for info)


We proudly offer a 10% discount to all of our military and law enforcement customers.