The barrel had to be changed after 200 rounds of continuous fire. The firing weapon could fire single or continuous fire. The gas duct is under the barrel with cooling fins, the closing spring is in the piston. 26 is an air-cooled gas pressure charger with a tilting block lock. The official name of the Czechoslovak army was Lehký kulomet vz. It was developed by Václav Holek in 1924 and manufactured by Zbrojovka Brno (ZB) in Brno under the name ZB 26. 26 was the standard LMG used by the Czechoslovak Army in the 1930s. Václav Holek (Praga) / Zbrojovka Brno (ZB)