We right on my port WWII helmet liner withot a problem.
Johnson
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US
A bit short i think
(2011-02-08)
I did not use this on a repro or original helm liner. I got the plastic liners they sell at the military supply shops here and had to drill holes at the front section of the liner for some screws to slip in the rings of the straps. So not sure it this is because of the liner im using. Good quality just the same
Johnson - US