. "Berezin machine gun" . "UBK machine gun" . "Berezin UBT" . "UBK" . . "Berezin UB machine gun" . "12.7 mm UBK" . . "21450.0" . "Berezin BS" . "UBT machine guns" . . . "UBT" . "Berezin UB" . . "UBS machine gun" . "BS" . "UBS" . . . . "Berezin UB#Development" . "12.7-mm (0.50-inch) Berezin UB machine gun" . . "1.347" . . . "UBT machine gun" . . . . . . . "Berezin UB" .