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Wolf Performance A1 Complete Upper 12.5" 5.56 NATO 1:7 Piston Driven
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Wolf Performance A1 Complete Upper 14.5" 5.56 NATO 1:7 Piston Driven
Wolf Performance A1 Complete Upper 16" 5.56 NATO 1:7 Piston Driven
Primary Weapons 2M111UA0B MK1 223 Wylde 11.85" Black Barrel Finish
Aero Precision M4E1 Enhanced Gas Piston Complete Upper with 18" .223 Wylde Rifle Length Barrel & 15" Enhan
Whether you're starting your first build or looking to upgrade your upper receiver, Classic Firearms has the complete gas piston uppers you need. Shop popular models like the Aero Precision M4E1 Enhanced Upper Receiver and secure the best price when you buy online at Classic Firearms!