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4/12/2014 1:56:48 PM EDT
I have around 40 rnd's down the pipe and I noticed this!

1. Is this normal? Is this what is happening? Wear inside upper at cam pin clearance cut

2. Am I OK to keep using or should I contact RRA?

3. Was the fun short lived?


http://i1154.photobucket.com/albums/p523/ladazombies/20140412_114153_zpseac3c277.jpg

http://i1154.photobucket.com/albums/p523/ladazombies/20140412_114139_zps43c380e4.jpg
4/12/2014 4:38:51 PM EDT
[#1]
It's fine. The cam key is hitting the upper.  Once it wears in it'll stop.
4/12/2014 7:47:00 PM EDT
[#2]
What is so specific about this upper that it can't be used on a normal lower?
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