Hey guys, This is my first post here. I just recently join d because I've been building my First AR. Specs. CMT Upper and lower billet Rifle buffer tube assembly MagpulPRS Primary Arms TiN BCG Fortis Switch 15" keymod rail and Fortis .750 low profile gas block I'm stuck on what barrel I should get. I've been looking at Faxon's Medium 20" Barrel, but I can't find many reviews on them. Has anyone had experience with them? What sone barrels I should look at? Preferably o e that uses a rifle length gas system and .750 gas block seat. Thank you so much. Happy shooting.