Pig-tail gas tube?

[Mr blasty]

So does the PRI tube offer much for a carbine gas system then? How about on the SBR's as well?

[Robb Jensen]

So does the PRI tube offer much for a carbine gas system then? How about on the SBR's as well?

It works okay on VERY overgassed 14.5-16" CAR gas guns. I'm talking barrels with gas ports like .090" and larger. Even then you would be far better served with a new barrel with the correct sized port of .0625"