Wing Bow I (MHFU)

If you're into sleep-bombing (putting monsters to sleep then stacking two Large Barrel Bomb+'s and detonating them), then this bow is the way to go. It is available as soon as High-Rank is reached. With NormalS/RapidBow Up, Bomber and Abnormal Sts Atk Up, which is possible by High-Rank, you can pretty much decimate most of the monsters in High-Rank in record time - unless it's raining.