A refreshing and interesting perspective. Likely some of us will link to it for those who would appreciate the viewpoint.
Yes, it's lightweight, and goes directly with the light ammo you carried. All too many shooters completely forget the average military user will likely have to walk miles between places to shoot - and then maneuver in combat with 300 rounds of ammo, a gallon of water, body armor, an MG bipod or LAW, NVG's, etc etc.
Slings in that environment are often removed and stowed away, the gun must be kept at hand and combat ready. The gun is not configured well to be shot with a sling, entirely due to the traditional swivel mount attached to the barrel. It will shift the point of aim if tightened up to International target shooting practices - which is NOT how the gun should be used unless or until a free float is installed. At that point, it's range capable.
Be careful in assessing the trigger needs replacement - as most target triggers use an adjustable take up screw to eliminate creep and slack anyway. One way to look at it is that proper adjustement - like the millions of bolt guns sold with one - will take out 65-80% of the travel, which means NOT creeping over 65-80% of the grit or roughness, too. That improvement can be had for less than $40, no gunsmithing needed, as opposed to $250 for a "great" trigger. You get your money's worth.
Ratting goes right along with the easy two pin takedown. Fortunately, it has nothing to do with accuracy at all, and attempting to get it quiet is money spent for almost nothing.
A good optic and quality ammo will go a long way to tightening groups, next would be a quality target barrel. Until all three are acquired, no other accessory will be any use at all, and most only add small increment improvements - including the free float. It's no joke that ammo and barrel makers can say what MOA is possible with their products - but all the others can't, and won't. It's not possible without the basic accuracy being there, the stuff they sell just doesn't LOSE as much accuracy, it's impossible to add more than that.
Interesting read, takes us back to why we choose to use the AR.