Alright, I need a new trigger finger. Anyone got one they can loan me? But I digress... I decided to load up my newly acquired Hailfire with 144 darts. I don't have 8 of the 18 Dart Clips lying around, so I cheated by putting an extra dart in a 35 round drum and used 6 other 18 round Clips. Unfortunately, during the test, the Firefly Tech clip decided to not feed correctly, so I didn't get a 100% accurate test. Still, if you've got the stamina in your trigger finger and nothing jams and you can swap from clip to clip with no problems, you can dish out 144 darts in just under a minute. While I realize that there's no combat situation where you would need to do such a thing, it's really just a testament to how long you could last in a game armed to the teeth with this Hailfire.
Below is a video of this test. Now, if you'll excuse me... I have one hundred and forty four darts to go pick up.