 The Israelis had successfully used a number of 175 mm M107 guns in the counter-battery role against its Soviet counterpart, the 130 mm towed field gun M1954 (M-46), but the introduction of long range rockets fired from Lebanon outranged them.The ERFB shells extended the range of the already formidable M107 to as much as , allowing the guns to counter-battery even the longest range rockets.Bull was rewarded for success of this program by a Congressional bill, sponsored by Senator Barry Goldwater (R-AZ) making him retroactively eligible for a decade of American citizenship and high-level American nuclear security clearance.