So my Daniel Defense upper showed up today and I'm very pleased ( as I always am with DD products ) but one thing I ran into was that when I put it on my DD lower it was so tight it barely would go on. It had to be forced on. I've had other DD uppers on this lower before so I know it's not that. I've never seen one this tight before. Has anyone else ran into this yet with a DD upper? If so how did you fix it? Did it loosen up after being fired? Did you file the part of the upper that the takedown pins go through? Thanks
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