The only thing the crossbow has in common with a FIREARM that a compound bow does not is that it's held by a stock and can remain cocked indefinitely. Other than that, both the crossbow and compound share the exact same components ie: limbs, cables, cams, sights, strings, arrows/bolts. They both propel the arrow/bolt the same way by energy stored in the limbs and by the use of the string and NOT by gunpowder!

How in the hell is that any way even close to a firearm???? If you ask me judging by the list above seems like the crossbow and compound bow have more in common than the firearm...but thats what I have been saying all along.