AutoCrossbow

AutoCrossbow (Inspired by Vietnamese Lien Chau crossbow and Repeating crossbow) In order to fire at range between 75 to 150 meter, you should open the crossbow's limbs and use a solid thin rope to tighten limbs' hole in order to secure the limbs, then use other ropes to activate the crossbow mechanism for firing. In addition, you must use the iron U-shape lock in order to secure the limbs further to avoid ineffective firing and limb breakage. In order to avoid the AutoCrossbow being malfunction,