Since you asked and
@Fabius suggested this to be the place to discuss I thought I’d offer my thoughts here.
I think the sections first and foremost needs to be defined by its tasks and the space it can fight in. Its tasks are known, but with the increase in thermal optics and small drones we can see platoon operating further and further apart. I’d suggest that a section however needs to be able to effect out to around 800 ms. I suggest that because it’s the practical range of shoulder fired weapons and MGs without tripods. Once we start requiring more static implements to be its outside of the sections purview.
What kind of effects? Well the section needs to do its jobs of assaulting small positions, ie two man trenches and Ops on its own and defending a portion of the platoons frontage. To do that we need to suppress infantry and destroy light armour / hard points. Ie we need automatic fire and the ability to project an anti armour effect, even better if it can also project HE as that aids in suppression. Right now we achieve that with two LMGs and M72s as needed. If we rethink the arms of the section to be the M72 is the first thing that needs to be corrected and the MG is going to stem from how that gets replaced. If we continue down the disposable route, ie AT4 or NLAW or some other option, then we don’t require a dedicated gunner and the two lmg solution can continue in a modernized form. However if we look and say we’d rather have a CGm4 in the section we’ll now we’ve pulled two more bayonets and I don’t think we can extend a laden CG team to be pepper podding along side riflemen. So then I’d want something heavier that can fire longer burst, preferable at greater range, in more of a fire group / assault group model. Ie a c6a1, the Danish m60, or something along those lines.