 The Zb 30 and Zb 30J were the later versions of the famous Czechoslovak machine gun, the ZB-26.However, the ZB-30 had some design differences, making it similar to the later ZGB-33, which was an early prototype of the Bren gun.Like the ZB-26, the "Wehrmacht" adopted the ZB-30 after the occupation of Czechoslovakia, renaming it the MG30(t); it was used in the same role as the MG34, as a light machine gun.