Hi okpud, My name is Eric. I was told on the reply to my thread of a gas block, that you had a different barrel made for the FNC before the Green Mountains became available w/o modding the gas block. Did you contour the barrel to FNC specs? I have my reasons for wanting a heavier barrel and would like to have your input. You're not Mark Hipes are you? In which case we talked about it already. If not, please let me know your thoughts on the subject. http://www.uzitalk.com/forums/showthread.php?83393-Gauging-interest-in-a-gas-block-for-a-heavier-barrelI'd also like to know what kind of results you got out of the GM barrels in terms of accuracy with commercial rounds. I have a GM barrel and was holding off getting it put on until I was certain I was going to at least get a reasonable chance of at least being competitive shooting commercial ammo. Just don't want to jump the gun and put on the GM barrel and be disappointed for not going the custom barrel and gas block route.