Is the bow of the water tiger slingshot square or round?

Don't compare the square bow and the round bow of the water tiger slingshot directly.

1, the square head can help to judge whether the push bow is vertical, and the plane at the top of the square head is different from that before and after the upper bow arm.

2. The aiming point of the round bow head is clear and the directivity is good, and the small supporting head does not block the aiming point.