M4e1 treaded 16in 5.56 m4 complete upper receiver w/ atlas s-one handguard - Aero Precision M4E1 16in 5.56 ATLAS S-ONE M-LOK Complete Upper Receiver with Flash Hider

Purchased this Aero Precision upper chambered in 5.56 from a recommendation from a friend. He said all the products they make are of high quality and worth every dollar. As soon as my package arrived I was impressed by the packaging of the upper and when I picked up this complete upper I could tell immediately the high quality and fit and finish was amazing. The ATLAS S-ONE Handguard looks and feels amazing as well. I am still waiting for my other parts so that I can assemble my AR and finally take this bad boy to the range for some PEW PEW time! Thanks Optics Planet for having Aero Precision parts in stock, awesome price and for great service and fast shipping!