<a href="https://en.wikipedia.org/wiki/RBL_40_pounder_Armstrong_gun" class="extiw" title="en:RBL 40 pounder Armstrong gun">RBL 40-pounder</a> parapet gun 1862. One of the earliest rifled breach loading guns used by the British Army. Developed and manufactured by Sir William Armstrong and Co of Newcastle upon Tyne.
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