A projectile launcher includes a frame having a vertical grip and a forearm brace configured to stabilize the projectile launcher using a user's arm. The projectile launcher includes a drawstring hub rotatably mounted to the frame and rotatable in a first direction and a second direction. Movement of a drawstring away from the drawstring hub corresponds with rotation of the drawstring hub in the first direction and movement of the drawstring toward the drawstring hub corresponds with rotation of the drawstring hub in the second direction. The projectile launcher includes at least one flexible limb attached to at least one power cable. A power cable section of the drawstring hub, where the power cable is connected, has a let-off portion. The let-off portion has a first section having a first diameter and a second section having a second diameter and the first diameter is greater than the second diameter.