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See all updates by kasaran
so the ZCI rotary hop unit is a very tight fit into the combat machine outer barrel
strykerles
I've found most hop units generally do have a gap, brought some brass rings from ebay and sorted it
colinjallen
It is quite normal for there to be a gap; that is what the brass ring is for.
Monkman
I think Luke put them in my guns I sent to him to get fixed..yep, very tight fitting..but awesome as well.