Here's the story. I've have a customized 16" Evolution barrel, that I love dearly. It of course came with a short gas system. I now want to convert that rifle to use a full length one piece Carbon Fiber free float tube from Clark Custom. I can't install a long one piece hand guard and then install the short gas system under it. (Maybe if I was really, really small:))
So the only option I see is to weld up the gas hole in the barrel and drill a new one at the std. 20"+ barrel location. The biggest problem is the front half of the barrel is .730" and I can only find gas blocks in .750". I would like to use Bushmaster's gas block with the weaver on 3 sides, but it's .750". Another problem is I don't know EXACTLY where to drill it, I am a machinist but I just don't know the location. And I don't know what diameter to drill it for a 16" barrel with a long gas tube.
I'm open to any suggestions.
Kevin