You are right that HR's uses bows or crossbows but in order to access the HR's you at least need a rifle to complete the standard regions. So if I get a region 12 rifle I won't be able to access HR 5(if it ever comes out).
My logic is that based on how things are going hidden region 3: stage 8-9 hidden region 4: stage 10-11 hidden region 5: stage 12-13 So I would need a region 13 gun to finish hidden region 5 whenever that comes out. I don't play that much so I need to makes the gun purchase count. Is my logic flawed?
I'm pretty disappointed also that I need to spend real money to finish the hunts. I love the new hunts but don't make people pay real just to finish them. It's a turn-off from the game.