I have a DPMS "MOD: A-15" SN:54xx
It was cast using the Essential Arms mold, then deep engraved with the DPMS info. The Machining was Spot on with no assembly or function issues. It was assembled using a DPMS lower parts kit and has a great break. The Upper to lower fit is just tight, no movement and no binding.
If not abused they are a good receiver.