Eugene Stoner wasn't a moron, he intended his weapon to use a clean burning powder to reduce fouling to the bare minimum and what made it worse was that Colt knew that the ball powder they had shifted to would cause the weapons to fail during QC at their factory and obtained permission to use the stick powder that Stoner had designed the rifle around.
From going to a dirtier burning power for a faster cyclic rate which increased fouling and jams, to deciding against corrosion resistant interior finishes, never mind the issuance of one barrel rod per seven or so men and it's criminal that these people were never brought on trial. The reasons why are myriad and Colt and the Pentagon were both culpable. Who knew the way door knobs worked would change the world in such a huge way? I hate to think about how much trouble users had with jammed ammo in vietnam and they had to take their whole gun apart to fix it while some jerk hiding in the bushes was shooting a perfectly working gun at them.
