but with door 24 included showing callout numbers for some of the parts of the door but without the callout number 24 for the door as a whole the parts of door called out are the outer and inner door plates 26 28 the door handle 30 pipe spacers 64 and rollers 66 fig7 shows a perspective view from the inside and from the left side of a gun port frame 80 and opening 114 in one implementation the size of the opening 114 or window measures approximately 12 inches by 12 inches 30 cm by 30 cm the gun port frame 80 comprises a left side wall 82 and a right side wall 84 as well as a ceiling 86 a sloped inner floor 88 and a horizontal outer floor 90 the sloped inner floor 88 allows for a smaller area of opening on the inside than on the outside of the opening 114 on the sloped inner floor 88 near the inside of the opening 114 is a ricochet bar 100 to stop projectiles from passing through the opening 114 should they first strike the sloped inner floor 88 a rain slot 102 divides left and right portions of the ricochet bar 100 and allows water to drain from accumulating behind the ricochet bar 100 in this view a lower edge of a drip bar 98 can be seen.