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How long can your tube extend past the barrel?

Custom Glock Racing

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I was looking for info on this last week and the longest I saw was about 8 inches.


I can now tell you that 18.5 inches past the barrel with cylinder bore is fine, on my Norinco 870 at least.  Not even a graze or nick from the shot on the tube.  







Edited by Custom Glock Racing
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