SD:AB Polsten

 is a British Anti-air unit.

Overview
2nd Airlanding Light Anti-Aircraft Battery R.A mission was to provide anti-aircraft defence to 6th Airborne Division. The battery was equipped with  18 x  40mm Bofors AA guns and 48 x 20mm Hispanio Suiza AA guns switched to Polsten Guns. Only a small detachment of the Battery went on to serve in Normandy Campaign. The detachment used captured FlaK 38 20mm and served as replacement gunners in the Anti-tank Batteries.