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 EPC-9/40 Receiver Set for Glock Mags w/ LRBHO, Blk. $259.99 Aero Precision EPC-9/40 Receiver Set for Glock Mags w/ LRBHO, Blk. quantity $259.99 × 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 $649.98 Total $649.98 Proceed to checkout A 3% convenience fee for credit card purchases will be added, TN. Residents pay 9.75% Sales Tax