It added shackles for two 50 kg (110 lb) bombs, two 20 mm MG FF cannons in the wings, and a 7.92 mm (.312 in) MG 17 machine gun in the cowling.
The offensive armament was improved by replacing two of the 7.92 mm (.312 in) MG 17 machine guns with 20 mm MG FF cannons, although these were never actually fitted.
All were armed with six 7.92 mm (.312 in) MG 17 machine guns — four synchronised weapons, two in the forward fuselage and one in each wing root, supplemented by a free-firing MG 17 in each wing, outboard of the propeller disc.
Later He 115s were fitted with a fixed forward-firing 15 mm or 20 mm MG 151 cannon, and two rearward-firing 7.92 mm (.312 in) MG 17 machine guns in the engine nacelles.
:Third prototype, armed with one 7.92 mm (.312 in) forward-firing MG 17 machine gun, and one 7.92 mm MG 15 machine gun in the rear cockpit.
Two 7.92 mm (.312 in) MG 17 machine guns were mounted in the nose synchronized to fire through the propeller arc.
Nevertheless, the Messerschmitt team made several attempts to improve the aircraft's performance by giving it longer wings, a taller vertical stabilizer, and installing two 7.92 mm (.312 in) MG 17 machine guns in the engine cowling.
The armament was to be the same as the Me 210 A-1: two 20 mm MG 151/20 cannons, two 7.92 mm (.312 in) MG 17 machine guns, and two remotely-controlled, rearward-firing 13 mm (.51 in) MG 131 machine guns.
Enigma machine | Rage Against the Machine | Gatling gun | Automated teller machine | Top Gun | Victor Talking Machine Company | Soft Machine | Lewis gun | Thompson submachine gun | Have Gun - Will Travel | The Time Machine | Linotype machine | gun control | Vickers machine gun | The Man with the Golden Gun (film) | submachine gun | gun | DeLorean time machine | The Man with the Golden Gun | Maxim gun | Darne machine gun | Rube Goldberg machine | MG 17 machine gun | Have Gun – Will Travel | Gun turret | Gun politics in the United States | The Wolseley Sheep Shearing Machine Company | The Naked Gun | Machine Head (band) | Machine Head |