A rear hand guard that's too tight can cause vertical stringing. Make sure there's a slight bit of fore-aft play; the hand guard should rattle just a tiny bit. That's where I'd start.
I'm bringing this back up because I was installing a ported gas plug from garandgear. the original plug was loose and had actually worked out a thread or so. would this have caused the stringing or any damage to the oprod?
todd, I returned to the tight handguard issue. what is the best way to fix this problem?
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