BCL 102 Issue

You mean there’s play between the upper and lower? Never held a 102 in person, but I have play between the upper & lower on my AR15, my ACR had it and my Swiss arms had it when I owned them. I used a half a foam ear plug in the AR & ACR and a chunk of eraser in the Swiss arms.
 
The Colt C8IURs we have at work all have a bit of play, my 102 has it, my personal ar15 has it. I just assume it's part of the design. Unless it's a lot of play, of course.
 
The upper and lower receivers are loose on my BCL 102. I wonder if SFRC/BCL will do anything about this?

Have you ever owned an AR before? As others have mentioned, a little play is normal, don't worry, it doesn't affect accuracy and as long as it isn't excessive there is nothing to worry about.
 
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