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CWatson
09-01-2008, 9:41 AM
I am building a 9mm AR featureless so I am going to put on a simple thread protector not a brake or fake can to cover the 1/2 x 36 threads.

I found a producer of thread protectors and I want to order the protector now but my upper has not arrived yet. For those of you with RRA 9mm uppers how far back from the muzzle do the threads go?

I do not want any exposed thread or overhang. The producer list 3/8, 1/2, and 5/8" lengths, which is correct?



Thanks,
CWatson

JagerTroop
09-01-2008, 9:53 AM
5/8"