Quote Originally Posted by DeviantLogic View Post
Pretty sure the gas port size isn't .625"...maybe .0625".

Alamo, The .625" refers to the length of the 1/2X28 threads. Gas port size would be something like .082" or so. Talk about over gassed!

The length of the threads is important so the threads are too long, running up inside a direct threat suppressor or preventing a muzzle device from properly indexing

FWIW, I have an 18" Griffin SPR/Match 223 Wylde barrel and I love it. Was just shy of $300, but for about the price of the GA barrel you could get a Rainier Ultramatch made from a Shilen blank. Food for thought