Quote:
Originally Posted by Hectic
i know this is an old thread but has anyone been able to see what type of inner barrel this can use (id like to put in a longer one) or is it a one off type barrel? I know i got a hi cappa one for my kj m9 and had to file some new grooves in the barrel to make it fit the hop up.
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Pretty sure it is a specific barrel. I know KM used to make a TN 6.04 Inner for the MK1 but I'm not sure if they still do. If you do some digging you might be able to find one.