Have a read of "Further notes on the Invention of the Flintlock" by John F Hayward in the book "Art, Arms and Armour"
Hayward discusses Lavin and Gusslers article, agrees with them and adds a bit more evidence.
The guts of the argument is that the gun supposedly from 1615 by Marin le Bourgeois has an identical cast figure to that on a gun by Duclos dated 1636. The type of lock on the Bourgeois gun is earlier than that on the Duclos gun, but Hayward disputes wether an identical casting would be used on two guns 20 years apart. He also discusses another gun supposedly by Jean le Bourgeois, but in fact signed PB -Pierre le Bourgeois,(died 1627). he states the the gun might not have been made for Louis XIII in 1615 because it's a man sized gun and the king was still a child in 1615.
So anyway, if you wanted to be safe you would say the flintlock was invented between 1620 and 1630
But I would love to here if theres any more recent evidence than 1980 too
Hayward discusses Lavin and Gusslers article, agrees with them and adds a bit more evidence.
The guts of the argument is that the gun supposedly from 1615 by Marin le Bourgeois has an identical cast figure to that on a gun by Duclos dated 1636. The type of lock on the Bourgeois gun is earlier than that on the Duclos gun, but Hayward disputes wether an identical casting would be used on two guns 20 years apart. He also discusses another gun supposedly by Jean le Bourgeois, but in fact signed PB -Pierre le Bourgeois,(died 1627). he states the the gun might not have been made for Louis XIII in 1615 because it's a man sized gun and the king was still a child in 1615.
So anyway, if you wanted to be safe you would say the flintlock was invented between 1620 and 1630
But I would love to here if theres any more recent evidence than 1980 too