Correct me if I am wrong, but isn't the A5 spring what makes it desirable? Or is it that fact you can run a rifle spring in a carbine?
That said, I run a super 42 in my 11.5" carbine gas, non-G H2 buffer.... No issues, but doesn't really blow my skirt up like the A5 system did in my 14.5" carbine gas.
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