Constant failures - Gemtech Suppressed Bolt Carrier Drop-In Replacement 5.56mm 4347825

From the start this bolt had issues. Failure to feed, failure to cycle, failure to eject, etc. Started with 300blk suppressed on the suppressed setting and got repetitive failure to eject. Switched it to unsuppressed and got the same. Took off suppressor, adjusted gas block, you name it and this thing would not run. Ended up throwing it in a 5.56 upper and one of the bolts on the gas key snapped. Looks like there was a crack in the bolt at the base that spread. So nice to have such a major imperfection in such an expensive bolt. Not sure if I just got a defective one or if these other reviews are bots, but all mine is good for is a paperweight or to hold in your hand for fisticuffs.