Heavy Crossbow of Concealed Fire
(Magic Item, requires attunement).
Ranged Weapon,
Attack Bonus: +1
range 100/400 ft
Damage: 1d10 + DEX piercing damage.
Concealed Fire.
While attuned to this crossbow, you do not reveal your position when making a ranged attack while hidden, provided you have half cover or better and do not move before or after the attack.
This effect represents specialized dampening enchantments, muffled firing mechanisms, and legally dubious illusion clauses embedded in the weapon.