Aero Precision Threaded Upper Receiver, M4E1, 5.56, 11.5 inch Barrel Flat Dark Earth - $353.99 Enhance the tactical capabilities of your weapon by equipping this Aero Precision M4E1 Threaded 5.56 w/ ATLAS S-ONE, w/ A2 Flash Hider Handguard Complete Upper Receiver. Each of these AR15 Upper Receivers

M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver w/ 9" M-LOK ATLAS S-ONE Handguard - FDE Cerakote - $312.97 M4E1-T Complete Upper, 11.5" 5.56 BRL, 9" M-LOK AR15 ATLAS S-ONE HG, FDE Shipping to FFL Dealer Required No Made In America? Yes FFL SOT Shipping Required No Aero Map Price 407.99

M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver w/ 9" M-LOK ATLAS S-ONE Handguard - $371.99 SKU APAR700312M29 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