Originally Posted by
kwelz
I think there may have been a batch of DD uppers like this. I had a stripped DD upper that was too wide at the lug. I had to use a stone to take a very minor amount of material off skit would even fit into ny of my lowers.
That sounds like a possibility. I have a DD upper, about 2 years old (bought during the infamous Smartgunner sale at the end of 2010,) mounted on a DD lower from Grant at G&R. Like you, I had to work on the rear lug with some steel wool to get it to fit. The rifle is still extremely tight, needing to be forced over my knee to get the upper to pivot. Other than that, it works great.
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