Gun which the harquebus preceded and the rifle succeeded (6)
I believe the answer is:
musket
(Other definitions for musket that I've seen before include "Old firearm" , "[DRAGON]" , "Ancient shoulder-gun" , "Shooter" , "Early infantry gun" .)
I believe the answer is:
musket
(Other definitions for musket that I've seen before include "Old firearm" , "[DRAGON]" , "Ancient shoulder-gun" , "Shooter" , "Early infantry gun" .)