DescriptionPolsten 20 mm Quad AA Gun, S&P Museum, Kars, Ontario, 28 Oct 2011.JPG
English: Canadian Polsten 20-mm towed quadruple-barrelled AA Gun, Swords & Poughshares Museum, Kars, Ontario. The Polsten 20-mm Quad AA Gun was a low cost Polish development of the 20-mm Oerlikon gun. Both the Oerlikon and the Polsten used similar 60 round drum magazines; however, the Polsten could use a simpler box magazine with 30 rounds. It remained in service into the 1950s.
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