Continue shopping “Aero Precision M4E1 Threaded Complete Pistol Upper FDE, 7.5″ Bbl. 5.56, Atlas R-One 7″ M-LOK HG” has been added to your cart. Remove item Thumbnail image Product Price Quantity Subtotal × Aero Precision M4E1 Threaded Complete Pistol Upper FDE, 7.5" Bbl. 5.56, Atlas R-One 7" M-LOK HG $389.99 Aero Precision M4E1 Threaded Complete Pistol Upper FDE, 7.5" Bbl. 5.56, Atlas R-One 7" M-LOK HG quantity $389.99 Update cart Cart totals Subtotal $389.99 Total $389.99 Proceed to checkout A 3% convenience fee for credit card purchases will be added, TN. Residents pay 9.75% Sales Tax