important in this application (there were also stocks of surplus guns and ammunition to be used up). Technical data Weight: 26.3 kg Length: 1.37 m Muzzle velocity: (MG FF with HE), (MG FF/M with AP or HE), (MG FF/M with API), (MG FF/M with (HE(M)), (MG FF/M with (HE(M)), (MG FF/M with (HE(M)) Rate of fire: 530 rpm (MG FF with HE), 520 rpm (MG FF/M with AP or HE), 540 rpm (MG FF/M with HE(M)) Round types: armor-piercing (AP) (MG FF/M), armor-piercing incendiary (API) (MG FF/M), armor-piercing high-explosive (APHE) (MG FF/M), high-explosive (HE), all with or without tracer (MG FF, MG FF/M), high-explosive incendiary (HEI), all with or without tracer (MG FF/M), high-explosive mine shell (HE(M)) (only MG FF/M), incendiary (I), all with or without tracer (MG FF/M) Ammunition specifications See also List of firearms List of weapons of military aircraft of Germany during World War Two Notes and references External links Anthony G. Williams' "Cannon, Machine Guns and Ammunition" Emmanuel Gustin's WWII fighter gun performance tables 20 mm artillery Autocannon Aircraft guns Military equipment introduced in the 1930s