information:classification, structural:reformatting
Socket bayonets

The major problem with plug bayonets was that when attached they made it impossible to fire the musket, requiring soldiers to wait until the last possible moment before a melee to fix the bayonet. The defeat of forces loyal to William of Orange by Jacobite Highlanders at the Battle of Killiecrankie in 1689 was due (among other things) to the use of the plug bayonet. The Highlanders closed to 50 yd (46 m), fired a single volley, dropped their muskets, and using axes and swords quickly overwhelmed the loyalists before they had time to fix bayonets. Shortly thereafter, the defeated leader, Hugh Mackay, is believed to have introduced a socket bayonet of his own invention. Soon "socket" bayonets would incorporate both socket mounts and an offset blade that fit around the musket's barrel, which allowed the musket to be fired and reloaded while the bayonet was attached.

An unsuccessful trial with socket or zigzag bayonets was made after the Battle of Fleurus in 1690, in the presence of King Louis XIV, who refused to adopt them, as they had a tendency to fall off the musket. Shortly after the Peace of Ryswick (1697), the English and Germans abolished the pike and introduced socket bayonets. The British socket bayonet had a spike with a triangular cross-section rather than a flat blade, with a flat side towards the muzzle and two fluted sides outermost to a length of 15 inches (38 cm). It had no lock to keep it fast to the muzzle, and was well-documented for falling off in the heat of battle.

By the mid-18th century, socket bayonets had been adopted by most European armies. In 1703, the French infantry adopted a spring-loaded locking system that prevented the bayonet from accidentally separating from the musket. A triangular blade was introduced around 1715 and was stronger than the previous single or double-edged model.