[prebancolt]

Thanks for all the info thus far guys.

I just picked up a 16" stainless olympic barrel with a block at the pistol position. I'm going to be shooting subs and supers out of this upper. What are the pros and cons of the adjustable gas blocks versus the adjustable gas tubes? Which ones are best i.e. which one should I buy? Any help/suggestions are welcome. Thanks again.

J