So I plan on making a 20inch m110ish 308. I found a place that has the Troy 308 mrf rail, I plan on using aero receivers, and a faxon 308 match 5r 20inch barrel. I’m going to get a surefire 300 sps with my reenlistment bonus and I know 308’s can be picky. Who has experience with using adjustable gas blocks? Is the superlative arms the best one? Also any reason why people choose the clamp on version? I’m looking to get one that will is the least likely for the gas adjustment to back off. I’ve seen too many friends have their 3gun rifle turn into a bolt gun mid match. I’m thinking about doing a JP silent capture spring too.