I have looked and looked and looked, and looked, and its seems impossible to find information on some bolt carrier groups that seem like they should be good but arent well.....BCM.....or Colt.....or LMT.....I was wondering if there is any chance we can get a solid thread listing some reliable options worth going with other than the obvious big guys. anyone have bolt carrier groups from place like hardened arms, LBE unlimited, ice arms....etc they would trust to be in there gun when the are in it deep? and if this has been done please if someone will help me find it that would be great. thanks guys, people on here have been great thus far....not sure why other forums put this place down all the time....about 90% of all information I find that leads me to any end goal I would say is found on here.