My NEA-15 Arrived!

The OP's receiver seems to have the forward assist boss rounded. The later picture shows as being squared.
Personally, I like the squared version, in keeping with this guns overall angularity. The rounded one shows the steps of the CNC machining.
Should have been smoothed imho.
What is the difference?

That isn't our upper that you're looking at, ours isn't stepped.
 
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