[quote=@Nerevarine]
<Snipped quote by Willy Vereb>

While that is fair, It really depends on how much PolishKing wants to diverge from the source mod (being Crusader Kings, it follows the Middle Ages up to the End of the Crusades). I'd rather not diverge too far from his vision of the RP

As pointed by Dinh, the use of automatic and semi-automatic is probably very very inefficient in a pre-industrial setting, and so I imagine firearms to be rather primitive, but I also do see them being more advanced than what we would have seen in the actual 12th century. 
[/quote]Nah, I wasn't thinking of copying AKs or anything close to that. I was saying that designs would inspire people to develop firearms that look more like what we recognize as guns. Basically the typical musket look would be popular earlier.
Similarly the mechanisms might help them to develop snaplock or flintlock earlier. Caplock is also plausible with various chemicals lying around.

Another technology I forgot to mention is printing which is just as important and people could get pointers to them from many sources.