Looking at that makes me wonder why the US Army has never considered replacing the Bradley's current turret with an unmanned non-penetrating one. You could reduce the crew by one and increase the carried troops by four. Not to mention reduce it's ridiculously high silhouette a bit.
probably because they are conditioned to think in terms of replacing the whole vehicle rather than just do a major overhaul. since i don't think that any new ones have been built since the 90's, beyond spare parts, i suspect it might be a bit tricky to modify as well.. pretty sure a turret change like that would require some mods to the turret ring.
though if they wanted to do it, they could probably slap some on some of the stuff to fix the Bradley's other flaws.. 30mm chaingun (the 25mm has proven to wimpy for more modern targets), maybe whatever active protection system they settled on. heck, i wonder if you could fit add-on armor to make it tougher.
hmm.. i wonder if there is a lighter ATGM they could fit instead of the TOW.. free up a bit more space inside. currently the M2 can carry 7 men (in space originally designed for 6), but the basic squad is 9. so they need to cram another 2 in. unmanned turret gives you 1.
okay, imagine yo've got your new, shiny unmanned turret...
change teh ammo belt on the gun.
clear a jam.
poke your head out to see where you're going.
etcetera.
linkless feed on the gun, so no need to change belts. either you have ammo in the drum or you don't. and the drum would still be inside the hull, so reloading from any stored reserve drums would be unhindered.
jams are already handled automatically through the chaingun's feed system, as are misfires. modern weapons are pretty jam resistant by design anyway.. you can fire over a hundred thousand rounds (IE, about 333+ full ammo loads for the current bushmasters) without ever running into one, and the motorized cycling just ejects the errant shell.
and vision blocks and systems have gotten good enough that commander don't need to poke their heads out.. and are trained not to, since that makes them more vulnerable. besides, the M2 still has its aft dorsal hatch, currently used for reloading the TOW launcher.