Real issue is actually going to be a (lack of) full auto. Sincerely doubt anything in these pics is an MG. Even if Ukraine fabricates automatic components (drop-in-auto-sears do exist for ARs), the barrels aren’t going to hold up to automatic fire well.
They might be useful in a police/border guard/militia capacity, though?
Are the Ukrainian grunts really using full auto that much? Does trench warfare make it useful in a way that urban and mobile warfare doesn’t use? My understanding is that basically no one outside of designated machinegunners really use full auto.
Anyway, like you said, at the very least it’ll free up other weapons for the front lines.
101st Airborne has been issued new M4A1’s since 2012, and the Army has been converting M4s to M4A1s since 2014.
https://asc.army.mil/web/portfolio-item/soldier-m4a1-carbine/
https://www.guns.com/news/2014/05/24/army-infantry-beginning-adoption-of-upgraded-m4a1-carbines
