 The armament of one 0.30-cal and one 0.50 cal machine guns mounted in the fuselage sides and firing between the cylinder heads of the radial engine was the same as the P-26A.The first Model 264 featured a long, narrow, sliding canopy, essentially a transparent continuation of the P-26's protective headrest, extending all the way to the windshield frame.The Wasp radial was enclosed in a full NACA cowling rather than the narrow Townend ring of the P-26.