Don't know diddle about new AR platforms, but back in the day I loaded a 20 or 30 round mag, slapped the backside against the palm of my hand and put in the ammo bag. I did lube the gun with LSA every few weeks, and rinsed it out with JP4 a couple times. 30-40 K rounds later it was missing about 1/3 of the rifling, but still had not jammed, or double fed.
I cleaned it before turning it in.
Tour 2 saw a similar experience with 3 CAR-15 guns.
For those unfamiliar with the CAR, they look a lot like modern toys.