The central feature of the P.82 was its four-gun turret, based on a design by French aviation company Societe d'Applications des Machines Motrices (SAMM), which had been licensed by Boulton Paul for use in the earlier Boulton Paul Sidestrand bomber, eventually installed in the "follow-up" design, the Boulton Paul Overstrand and in the Blackburn Roc naval fighter.