Upper Receivers

Aero Precision M4E1 16" Carbine-Length /Atlas R ONE handguard CALIFORNIA LEGAL - .223/5.56

This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS...

Aero Precision AR15 Complete Upper 16" Mid-Length Barrel w/Pinned FSB CALIFORNIA LEGAL - .223/5.56

This AR15 Complete Upper features a 16" 5.56 Mid-Length Barrel w/ Pinned FSB and Magpul™ MOE® Mid-Length Handguard

Aero Precision AR15 Complete Upper 16" Mid-Length Barrel w/Pinned FSB FDE CALIFORNIA LEGAL - .223/5.56

This AR15 Complete Upper features a 16" 5.56 Mid-Length Barrel w/ Pinned FSB and Magpul™ MOE® Mid-Length Handguard

Aero Precision Assembled AR15 Upper Receiver

** The Aero Precision Upper pictured above is California legal. ** Manufacturing a great receiver isn't just about what the end product looks like. It's about what it feels like, how it works, how it handles and performs. Aero Precision...

Aero Precision M4E1 16" Complete Upper w/ ATLAS R-ONE Handguard CALIFORNIA LEGAL - .223/5.56

This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS...

Aero Precision M4E1 Complete Upper, 16" Mid Barrel, EM15 HG Gen 2 CALIFORNIA LEGAL - .223/5.56 - FDE

** Product pictured is California Legal as is and does not require CA Compliant parts or modification. CA Compliant parts are buyer's responsibility when built into rifle. ** Click OTHER DETAILS to read more about this product from the...

Aero Precision M4E1 Complete Upper, 16" Mid-Length Barrel, EM-15 Gen 2 HG CALIFORNIA LEGAL - .223/5.56

** Product pictured is California Legal as is and does not require CA Compliant parts or modification. CA Compliant parts are buyer's responsibility when built into rifle. ** Click OTHER DETAILS to read more about this product from the...

Aero Precision M4E1 Enhanced No FA Complete Upper, 16" Mid, 15" Enhanced M-LOK CALIFORNIA LEGAL - .223/5.56

** Product pictured is California Legal as is and does not require CA Compliant parts or modification. CA Compliant parts are buyer's responsibility when built into rifle. ** Click OTHER DETAILS to read more about this product from the...

Aero Precision M4E1 M-LOK Complete Upper 18" CALIFORNIA LEGAL - .223/5.56

** WARNING! The addition of certain parts such as Collapsing/Folding Stocks, Pistol Grips, Flash Hiders, etc. might make your firearm illegal within California. Please ensure your firearm remains CA compliant. ** ** The Aero Precision M4E1...

Aero Precision M4E1 Threaded 16" 5.56 Mid-Length No Forward Assist Complete Upper Receiver w/ 15" M-LOK ATLAS S-ONE Handguard CALIFORNIA LEGAL - .223/5.56

** Product pictured is California Legal as is and does not require CA Compliant parts or modification. CA Compliant parts are buyer's responsibility when built into rifle. ** Click OTHER DETAILS to read more about this product from the...

Aero Precision M4E1 Threaded 16" Mid-Length No F/A Complete Upper Receiver w/ 15" M-LOK ATLAS R-ONE HG CALIFORNIA LEGAL - .223/5.56

** Product pictured is California Legal as is and does not require CA Compliant parts or modification. CA Compliant parts are buyer's responsibility when built into rifle. ** Click OTHER DETAILS to read more about this product from the...

Aero Precision M4E1 Threaded 20" Complete Upper Receiver w/ ATLAS S-ONE Handguard CALIFORNIA LEGAL - .223/5.56

This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Our proprietary ATLAS attachment system is a durable and...