08-19-2015, 01:41 AM
I have a 20 inch barrel...I was having feeding problems early on with my new Grendel.... I had the local gunsmith open up the Gas port to solve to problem. They stepped it up in small increments till the feeding issues went away and it was locking to the rear every time... But they went to .103 gas port size... It seems a bit big but it works great and I have not seen any sighn of over gas issues at all.... Is that a bit big?

