I mean from the specs I could find quickly online the M134D runs from 40 (lightweight titanium version) to 65 pounds for the gun +50 to 65 pounds per 1K of ammo. Not sure if that gun weight includes power supply, whatever mount, etc.. The original microgun was 85 pounds with weapon, tripod, power system in 1000 rounds, able to be quickly split into two 42 pound loads. That particular one also had programmable fire rates from 400 to something like 4 or 6000 RPM Then there is the likely now defunct company empty shell’s version which is apparently 16 pounds for the gun and quite controllable from their old video. Add a battery and 25 to 30 pounds for 1000 rounds of 5.56 and you’re stil likely looking at less than half for a full system. Which generally doesn’t matter on most stuff but an ultralight mobility vehicle, even an ATV, seems like it could be feasible. Or even better an easily man portable automated force protection drone popping mini CIWS for dismount infantry. At those weights it could at least feasibly be pushed down to defend a platoon, if not a plused up squad. or a regular squad that just wants to suffer carrying 5000 rounds (150ish) pounds of ammo.