The guys I've shot with were front line during their service. I wonder if the military like the RCMP has all their members requalify? If so then many will be made of rear echelon and or administrative types. If so then the shooting practice levels and training observed may not reflect the actual soldiers on the front lines.
Give them the best equipment possible. If there's an improvement to the AR that allows the same or better accuracy and improves reliability and ergonomics then they should get the updates. I can understand not changing to an entirely new system for minimal gain but there are solutions that really aren't much more than a software upgrade.
I just checked with a coworker who served in the Canadian military. He advises he qualified every year but before missions those in the infantry received a lot of extra practice in peeperation for the mission. I was told the non infantry such as cooks going had to qualify once for the missions but didn't receive the extra shooting time or training.
It can vary tremendously.
I've seen Inf Sgt's PPCLI and RCR) that cannot pass a PWT without the 5.56mm pencil, I've also seen young Privates that shot rifle team, who got to shoot 20k a summer, and where great at the end, in a rifle team great, not a CQB god type.
Remember that just a few years ago, that shooting while doing a turn was considered super high speed in the CF (outside DHTC), shooting on the move was not done outside of field live fire ranges etc.
Everywhere you go you will find a standard, whether or not that standard is a good one or not, does not mean its not the standard...
Generally speaking outside of special units the firearm skills are low to abysmal.
I've seen Soldiers fire 30rds at a target and blame the gun and the ammo when they did not hit Mr Bad Guy in his manjammies, and he gets tagged by someone else and there are only the 1-2 rds in the target (ones that the shooter fired).
When your ammo has a 5MOA accuracy acceptance currently (M855) your also not really giving the soldier much to work with.
Someone who shoots 100 rds a year, and all of a sudden who gets 1000rds of 'training' will think its great. Someone who shoots for a living will wonder why they wasted 1000rds.
Ammunition in itself is not training, you can waste a ton of ammo on copper masturbation and get nothing from it, but thinking it was 'great'
You can learn a ton of things with less ammo and good instruction.
I still want to know what everyone thinks is wrong with the M4? And I really dont care to listen to piston pukes, as I can pretty much guarantee you the only 5.56mm piston gun worth half a #### is the Hk416, and then it depends on what version you get, the ones for super cool guys, or the run of the mill gun. You can do everything (except fire underwater) with a DI gun that you think you need a piston for, without the many piston drawbacks.