▁six ▁to ▁eight ▁hours ▁to ▁accomplish . ▁It ▁broke ▁down ▁into ▁three ▁loads ▁for ▁transport , ▁the ▁bar rel , ▁carriage ▁and ▁the ▁ground ▁platform . ▁A ▁modified ▁version ▁entered ▁service ▁in ▁ 1 9 4 2 ▁as ▁the ▁H ▁ 3 9 / 4 0 ▁although ▁the ▁changes ▁merely ▁simplified ▁production . ▁A ▁total ▁of ▁eigh teen ▁were ▁delivered ▁to ▁Germany . ▁ ▁Am mun ition ▁It ▁used ▁both ▁Czech oslov ak ▁and ▁German - des igned ▁am mun ition . ▁The ▁Czech oslov ak - des igned ▁ 2 4   cm ▁Gr ▁ 3 9 ( t ) ▁HE ▁shell ▁had ▁a ▁weight ▁of ▁. ▁It ▁used ▁both ▁nose ▁and ▁base ▁f uses , ▁two ▁co pper ▁driving ▁bands ▁and ▁contained ▁a ▁ ▁burst ing ▁charge ▁of ▁T NT . ▁The ▁German ▁copy , ▁the ▁ 2 4   cm ▁Gr ▁ 3 9 ▁um g ▁had ▁only ▁a ▁German ▁nose ▁fu ze , ▁soft - ir on ▁driving ▁bands ▁and ▁a ▁smaller ▁charge ▁of ▁. ▁It ▁also ▁used ▁a ▁Czech oslov ak - des igned ▁anti - con crete ▁shell , ▁the ▁ 2 4   cm ▁Gr ▁ 3 9 ▁Be , ▁that ▁had ▁co pper ▁driving ▁bands . ▁It ▁used ▁ 5 ▁bag ged ▁charges ▁that ▁were ▁en closed ▁in ▁a ▁single ▁larger ▁bag . ▁In cre ments ▁were ▁simply ▁removed ▁to ▁adjust ▁range ▁as ▁necessary . ▁ ▁Com bat ▁history ▁The ▁ 1 st ▁Battalion ▁of ▁Art illery ▁Regiment ▁ 8 1 4 ▁was ▁formed ▁on