12-28-2016, 12:40 PM
This topic came up a few months ago. I think this is a thread that might help answer your question. General consensus is there is no real advantage over rifle length gas system on 26" 6.5 Grendel if my memory is correct.
http://www.65grendel.com/forum/archive/i...12524.html
http://www.65grendel.com/forum/archive/i...12524.html

