
Originally Posted by
Iraqgunz
LMT used to use a .071 port as well and recently switched to .078 for commercial stuff. Noveske uses a .081 port. Measured multiple times on multiple barrels with pin gages. I have measured 3 different Rainier Arms barrels and all were at .071-.072. Those barrels worked fine unsuppressed with M855 and M193.
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