I remember this episode too and was happy to see some Zako, but It was disappointing. The Zako were dressed in baggy outfits unlike the typical wardrobe for women in this show of skin tight spandex and high heels. With the limited fight scenes, it would have been sexier if they used the typical wardrobe...not unlike the two sisters that first captured Buck.
Agree that the uniform stealing scene could have been hot, but for cable TV we at least got to dream about it. ;)
I don't recall the weapons having stun settings, but understood they shot near them to stun them from the blast. Don't think Buck would ever shoot women in such a situation especially if he felt it was something he could change, so it fit his character, and I liked that they were KO'd.