It's a heavyweight weapon! Welcome to the club! I love heavy weapons
The more I think about it the more I see some potential here, it looks like it paints decently, and the arrows seem like they're a 4-shot, so they're probably the same as tri-stringer's. It also gets those arrows with the first charge, so you can concentrate them on one area to flush someone out from under a ledge or something, and you can always launch them vertically to attack a single player. It probably has insane object damage too. And the charge time and ink consumption look manageable.
My biggest worry is the close range one-shot. I doubt you need to hit all 5 arrows to kill, if it's 4, it's going to be really hard to hit, but you still get the explosions from the other arrows, so it could be fine? If it's 3 arrows though, that's really good imo, it doesn't sound too difficult to hit.
I could see it being really fun, it just needs its specials (preferrably stamp) to get buffed and it could be solid