▁components ▁that ▁remained ▁in ▁Ira q ▁were ▁destroyed ▁by ▁the ▁United ▁Nations ▁after ▁the ▁ 1 9 9 1 ▁Pers ian ▁G ulf ▁War . ▁ ▁Dev ices ▁ ▁Baby ▁Bab yl on ▁The ▁first ▁of ▁these ▁super g uns , ▁" B aby ▁Bab yl on ", ▁was ▁a ▁hor izont ally ▁mounted ▁device ▁which ▁was ▁simply ▁a ▁prototype ▁for ▁test ▁purposes . ▁It ▁had ▁a ▁bore ▁of ▁ 3 5 0   mm ▁( 1 3 . 8   in ches ), ▁and ▁a ▁bar rel ▁length ▁of ▁ 4 6 ▁metres ▁( 1 5 1   fe et ), ▁and ▁we ighed ▁some ▁ 1 0 2 ▁t onnes . ▁After ▁conduct ing ▁tests ▁with ▁lead ▁project iles , ▁this ▁gun ▁was ▁set ▁up ▁on ▁a ▁hill side ▁at ▁a ▁ 4 5 ▁degree ▁angle . ▁It ▁was ▁expected ▁to ▁achieve ▁a ▁range ▁of ▁ 7 5 0   km . ▁Although ▁its ▁mass ▁was ▁similar ▁to ▁some ▁World ▁War ▁II ▁German ▁" large - cal ib re ▁guns ", ▁it ▁was ▁not ▁designed ▁to ▁be ▁a ▁mobile ▁weapon ▁and ▁therefore ▁it ▁was ▁not ▁considered ▁a ▁security ▁risk ▁by ▁Israel . ▁ ▁Big ▁Bab yl on ▁The ▁second ▁super gun , ▁" Big ▁Bab yl on ", ▁of ▁which ▁a ▁pair ▁were ▁planned ▁( one ▁to ▁be ▁mounted ▁hor izont ally , ▁at ▁least ▁for ▁test ▁purposes ), ▁was ▁much ▁larger . ▁The ▁bar rel ▁was ▁to ▁be ▁ 1 5 6 ▁metres ▁( 5 1 2   fe et