Special Weapons

Weapons with the Special property are elaborated here.
Bayonet If mounted to a Two-Handed firearm, the bayonet deals 1d6 Piercing Damage and has Reach.
Harpoon If a creature is hit, the harpoon lodges into them and is connected to the harpooner via a rope. While harpooned, the creature’s speed is halved, they cannot dash, and they can only move within the length of the rope.
To escape the rope, the creature can use their action to remove the harpoon, dealing an additional 1d8 Slashing Damage.
Hand Blunderbuss Can be loaded with Scatter Shot ammunition. All targets in a 10ft cone must make a Dexterity Saving Throw. On a fail, the target(s) take 3d4 Piercing Damage, or half as much on a success.
Blunderbuss / Double Barreled Blunderbuss Can be loaded with Scatter Shot ammunition. All targets in a 15ft cone must make a Dexterity Saving Throw. On a fail, the target(s) take 4d4 Piercing Damage, or half as much on a success.
Hand Cannon The Hand Cannon has three different loading options.
Mortar: Ammunition (Range 120), Loading, Light. All targets in a 20ft diameter sphere must make a Dexterity Saving Throw. On a fail, target(s) take 1d10 Piercing Damage, or half on a success. Requires Scatter Shot ammunition. Throwables: Ammunition (Double Range of Throwable), Loading, Light Improvised Weapon: Ammunition (Range 20/60), Loading, Light, Misfire 1-3 (Depending on object)
Volley Gun Fires all seven barrels at once. Make an attack roll against one target within range. If you hit, the target must make a Dexterity Saving Throw. On a fail, the creature takes 1d10 for every shot fired, or half as much on a success. You must make a Constitution Saving Throw DC 8 + number of shots fired. On a fail, you take 1d8 Bludgeoning damage, or half as much on a success.
Duck-Foot Pistol Up to four targets in a 20ft cone are targeted by this firearm. Make an attack roll against each target. Each target can only be targeted by one shot.
Pistol Sword Use Shortshort stats for the sword, and Palm Pistol stats for the pistol. -1 to attack rolls for both weapons, the pistol because of the awkward aiming, and the sword because of the disproportionate balance.