Латунная вставка (втулка) в перепуск для МР-512 (диаметр вн. 3,2мм)
This brass insert for the MR-512 air rifle has an internal diameter of 3.2mm and an external diameter of 4.8mm, fitting a bore of 4.8mm. It is 15.5mm long and weighs 2g.
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