Upper receiver comes completely assembled. Forged from 7075 aluminum that has been T6 heat treated and hard coat anodized (Mil-A-8625A). Features an A1 style fixed carry handle and shell deflector. These do have M4 ramps.
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Ordered it and had it in my hand in less than a week, machining looks good, ano looks good, price was good, my 733-ish build is complete. Couldn’t be happier.