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The Ordnance RML 7 pounder Mk IV "Steel Gun" was a rifled muzzle-loading mountain gun primarily used by the Indian Army. 7 pounder referred to the approximate weight of the shell it fired. ==History== Development began in 1864 to replace the RBL 6 pounder gun of 3cwt, which had proved too heavy for a mountain gun. Several Mks of 7 pounder RML of 2 cwt were tried in 1865 by boring out and rifling old SBML bronze guns, but were still too heavy.〔Ruffell〕 Several Mks of new steel barrels (the first British all-steel gun, hence the name "Steel Gun") were then produced of and but were not considered powerful enough.〔 Mk IV of with a longer bore was settled on for production in 1873. It was superseded by the RML 2.5 inch Mountain Gun from 1879. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「RML 7 pounder Mountain Gun」の詳細全文を読む スポンサード リンク
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