At this point in time the local blacksmith was in fact able to make firearms, where he could not make crossbows.
And if they where so ineffective, why where the Hussites so fond of them?
The replica used by the guy I linked to, is a copy of the Tannenberg gun, date Pre 1399.
(since it was found on the sport of a castle destroyed in 1399)
I agree that they should not be used by a typical solider or guard. But they where uses on the battlefield.
(the battle of Beverhoutsveld in Flanders on the 3rd of may 1382. to mention one
they are also mentioned when we look at the crecy campaign, (1346))
There is simply no way around the historical fact that firearms was used by this point in time so there are no historical reason for not having them in the game.,
Who should have them?, how many? and similar, now that can be debated.
Books and articles about early firearms. (I put the title of the book in itallic)
Atzbach, Rainer. 2010: Die Belagerung der Burg Tannenberg bei Darmstadt 1399. Fundberichte Aus Hesse. 50 s.707-728
• Bretscher, Ulrich. 2009: Handgonnes (musketeer.ch) http://www.musketeer.ch/blackpowder/handgonne.html
• Contamine, Philippe. 1980: War in the Middle Ages.[La Guerre au moyen âge].
• Edwards, J.C. 2004: What Earthly Reason? Medieval History Magazine. 7. s. 54-63.
• Krenn, Peter, Paul Kalaus & Bert Hall. 1995: Material Culture and Military History: Test-
Fireing Early Modern Small Arms. .Material History Review. 42. s101-109.
• McLachlan, Sean. 2010: The Medieval Handgonnes. Oxford. England.
• Pegler, Martin. 1998: Powder and Ball Small Arms. Wiltshire, England.
• Turnbull, Stephen. 2004: The Hussite Wars 1419-36. Oxford. England