RTF is a global modification that replaces all towns in the game.

Why?!

Because he's so stocky, and his arms and legs look bigger and bulkier. He's wearing a loincloth made of hide.

Added 12 minutes later

The bow is very large and thick, with a large glove, a large helmet, and a large boot on the skeleton's foot.

This is well thought out, because the skeleton has no flesh or muscles, so it wears clothes that don't fit. And in general, originally there were some improved archers who were replaced by crossbowmen. So, skeleton archers are the undead version of the improved archers. Here's the info: https://mightandmagic.fandom.com/ru/wiki/Блог_участника:Рон54/интересности#Скелеты_лучников