why not? I have a .693 barrel - that's about the right size
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And as FiXeL said - with pumps it's more about trust than anything else - we didn't have to use plugs because we were confident about not getting hurt by some freak occurence, but trust us to have one (barrel bag, not freak occurence) when we go "visiting". After all, paintball is not about "shooting people with paint" - any idiot can do that. Paintball is about shooting people in a safe way.