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 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...

Aero Precision M4E1 Threaded Complete Upper, 16" M4 Barrel, 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 Complete Upper, 16" Mid-Length Barrel, 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...