I dislike that black web sling currently on the M16/M4 series rifle, nowadays so much is available from the private sector for military. You see a lot of variations in tactical slings that are a big improvement.
Had to stop by the weapons rebuild shop here on Bagram, spotted a M1907 sling still in plastic with NSN number. Still being used by the military after all these years, of course it left with me and is now on my M16A2. Would not believe how many officer's comment on it, and want one.
It will go home with me eventually, will go on my Winnie Mod-1917, have one on my Garand of course. An original Kerr canvas sling is on the 03A3.
What I like to put on my Brit Enfields are the 50/60's era green canvas Garand/M14 slings with the clip at the stock end and the quick adjustable buckle at the for-end.