Never really had any failure to eject or feeding problems with it since i built it..but if yo take a look at this video ..I am ejecting brass in the 1 oclock direction showing an indication of the gun being overgassed.. After turning the gas down 3/4 way to close ..I am now ejecting Brass at a 4 oclock direction which is perfect and the gun is not over gassed.. But i discovered while doing this my bullet velocity increased to about 100fps faster than my previous testing..