Oz, get a metric thread file. All you need is the 1.00mm pitch anyways, and they cost about $15 or so.
I didn't need to do any mods to fit the PDI in my M16, and this was the Gen 1 aluminum outer barrel as well. I would venture to guess that PDI's 6.04mm may really be 6.035mm, but I don't have the precision in my calipers to measure that small.
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Age verifier Northern Alberta
Democracy is two wolves and a sheep discussing what's for dinner.
Freedom is the wolves limping away while the sheep reloads.
Never confuse freedom with democracy.
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