>>23452973
>What caliber are the Shot Lancer's machineguns anyway? Is it higher caliber than a Zaku's machinegun?
The Zaku's gun fires 120mm rounds. Not sure if they were ever specified, but the machine guns built into the shot lancer handle are very tiny, each shot lancer has two to four of these machine guns and it's already a smaller MS and handheld weapon than the Zaku and its machine gun. They're like compact like head vulcan guns so maybe shooting 30mm to 60mm rounds.

>I'd wager a zaku could actually hand the late UC mini suits better than it could the mid UC fat asses honestly. Tissue paper armor seen in >>23452858 and all that jazz so even it's outdated weapons are a serious threat if it can land them such as via a surprise attack.
You're not really wrong. The G-Cannon is a support fire MS made for the miniature MS era and the base model carries gatling cannons that fire 130mm rounds which is similar to the Zaku machine gun, except it's got two of them and could probably fire at a higher rate.

https://gundam.fandom.com/wiki/F71_G-Cannon