When you take off the armour, you change to the minigame's datablock. This will not work well with, for instance, Team Deathmatch. Mods such as the existing Parachute and the Old School Rifle (both not on RTB for the same reason) will also remove your armour but keep the mounted image until you realise that it doesn't work. Being hit by the Horse Ray will turn you into a horse which has no 'extra' health (although they have 250 by default) but with armour clipping through it.
Also, you seem to be wasting a lot of datablocks for several useless mounted images.