NS is dealing with my bolt issue, in the process I contacted CSA directly and it seems that the cracked bolt is not un common in the 19 inch barreled rifles in 5.56. Apparently it has something to do with the pressure of the round when fired, they are supposedly re designing a NEW bolt for this rifle sometime in July release date. CSA told me that if NS warranties it and it fails again that it would be replaced with the new bolt group. It is good that it is being dealt with but in my eyes the flaws that have happened with this style of rifle based on a proven military design would not experience this many failure's, It's as if when they designed it to fire the 5.56 cartridge they made it work but did not make it not fail. which is what one wants in a potential service rifle, little to no failures lets hope the new parts fix this on going problem. Dirtdiver1