What is the best size for a slingshot bow door

4.0cm-5.0cm.The bow door generally refers to the size of the opening at both ends of the bow or slingshot, wooden bows generally do not have a large bow door, most of the common wooden bows are special for the flat leather, the size of the bow door can be referred to the size of the bow door of the traditional bow, that is, about 4.0cm-5.0cm (inner bow door). The term "bow gate" is frequently used among slingshot enthusiasts. According to the different arm lengths of different bow holders (slingshot), you need to choose different sizes of slingshots with different bow gates, and the general size of the bow gate is around 4.0cm-5.0cm in most cases.