Jimbo45
03-23-11, 21:01
I have a 6920 barrel I am considering chopping to 14.5" and pinning a hider on. Do the 16" 6920 barrels and the 14.5" 6921 barrels share the same gas port size? I want to make sure that once its at 14.5", it has the correct size port as designed. I suspect that they are the same, but does anyone have the measurements? TIA