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Aftemarket for models
MG 81Z machine gun
Was installed on aircraft Il-4, Pe-8, Mbr-2, Er-2, Db-3, Tb-3, Tb-4, Sb-2, Ar-2, R-5, R-Z, U-2
Was installed on aircraft SB-2, Pe-2, Er-2, Il-2, Tu-2, Il-4, Pe-8
Was installed on aircraft R-5, R-6, U-2 (Po-2), Mbr-2, Mbr-4, Mbr-2, Tb-1, Tb-3, Sb-2
Was installed on aircraft Sopwith 1 1/2Strutter, (RFC), DH.9A, Vickers Vimy, Bristol Fighter