Heavy Crossbows are martial, ranged weapons that fire off large, sharp bolts that deal 1d10 piercing damage on a hit and have the Ammunition, Heavy, Loading and Two-Handed properties. They have a normal range of 100 feet, and a long range of 400 feet.

Properties

Ammunition
You can use a weapon that has the ammunition property to make a ranged attack only if you have ammunition to fire from the weapon. Each time you attack with the weapon, you expend one piece of ammunition. Drawing the ammunition from a quiver, case, or other container is part of the attack (you need a free hand to load a one-handed weapon). At the end of the battle, you can recover half your expended ammunition by taking a minute to search the battlefield. If you use a weapon that has the ammunition property to make a melee attack, you treat the weapon as an improvised weapon.

Heavy
Small creatures have disadvantage on attack rolls with heavy weapons. A heavy weapon’s size and bulk make it too large for a Small creature to use effectively.

Loading
Because of the time required to load this weapon, you can fire only one piece of ammunition from it when you use an action, bonus action, or reaction to fire it, regardless of the number of attacks you can normally make.

Two-Handed
This weapon requires two hands when you attack with it.

Superior Strike

Piercing Shot.
You fire a shot from your weapon packed with destructive force. It flies in a straight line a number of feet up to your weapon’s normal range. Each creature whose space the ammunition passes through must make a Dexterity saving throw. A creature takes piercing damage equalling a number of d6s equal to your proficiency bonus on a failure, or half as much damage on a success. The shot stops early after it passes through the space of a Huge or larger creature, or through an object more than 1 foot thick or with an AC of 17 or higher.