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AR15.COM
4/18/2014 5:13:25 PM EDT
Why are your chrome bcgs semi auto?  Thanks!
4/18/2014 6:28:24 PM EDT
[#1]
I have to say I always wondered this too
4/30/2014 12:22:03 PM EDT
[#2]
Nobody knows, eh?
4/30/2014 7:58:19 PM EDT
[#3]
I was told that it's because neither are Mil-Spec ...
4/30/2014 10:43:36 PM EDT
[#4]
Fully chrome used to be mil spec.  Nickel boron BCGs etc are mil spec in terms of carrier profile because it's more desired.