The Musket is a weapon that does 75 damage per shot. However it does have damage drop off due to range (very long range), but this damage drop off is less impactful than the one the Flintlock Pistol has.
When first swapped to, the gun's area of aim will be larger causing more chance to miss. Over time the circle will shrink making the shot more and more accurate.
An empty Musket requires loading with ammunition to work.
The Musket has a durability system, requiring repair after 6 shots. It can be fully repaired for free by taking the weapon to a workbench and selecting the repair button at the top of the menu.
After reaching 0% durability the gun begins to have around a 100% chance of misfiring, consuming the ammunition and durability, locking you into a short animation, but not firing the shot.
Muskets can be found in the armory.