While the design is unique, quality in manufacturing left much to be desired - Vltor Modular Upper Receiver

This upper while a unique design present the appearance of a very sturdy upper of which to build an accurate rifle from the quality / control during manufacturing is poor. The upper receiver coating on the interior was extremely inconsistent, high spots, low spots, unequal coating throughout, sever lack of quality control or attention to detail. Also while this upper receiver boast a lifetime warranty, the fine print warning notes that any alterations to this upper "such as new dust cover or forward assist " would void the warranty, if alterations are desired without voiding the warranty you may sent the upper and parts to Vltor to be changed for a fee. I missed this fine print, ordering an SI dust cover as well as an SI forward assist, took the upper , parts, new dust cover, forward assist, barrel, free float rail ect... to my local gunsmith (personal friend), he stated "I can put this together for you but changing the dust cover and forward assist will void your Vltor lifetime warranty, do you still want me to proceed ?", of course the answer was "no I will be returning the upper to Optics Planet ". I ended up buying the Seekins Precision A223 Billet upper their in his shop for only $40 more. After seeing this Vltor uppers quality with concerns then looking at the Seekins upper side by side there was absolutely no comparison, the Seekins by far is a superior product.