I have a DD M4. Bought it in 2008. Under 300 serial number and stamped Savannah, GA. Probably the best out of the box AR 15 I've ever owned. Shoots everything without a hiccup. From the cheapest brown bear laquer coated .223 to wolf to USGI ammo. Mil spec out the box. Only gun I'd trade this for would be a LWRC.